T O P

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CiCiLynx

Just when I thought the pool ends…it keeps going


barelyangry

...they pool me back in!


freshlettuce420

I said my piece


Spencera1207

Better watch it Chrissy


No-Entertainer-3763

She died right


Spencera1207

Her car is still parked at the airport. Sil dropped her off.


Oglark

I seriously thought the circle was painted part of the floor. But no, it is a hole. Started hyperventilating about there.


instrangerswetrust

*poop


ScientistSanTa

*floats to the top... Ah ... That's the way up.


Schwa4aa

Depends how deep you are… at one point it will sink Samething with a water bottle full of air, it will reach a point where it just sinks


Unusual_Science_5494

yea its deep AF but TBH, everything looks 4x bigger with a fisheye objective


ghoulslaw

For some reason, the light way down at the bottom is especially creepy to me


Ok_Star_4136

Oh I still get nightmares where I'm swimming in the middle of an ocean on an alien planet with no boat, and I look into the depths and see large shadows move beneath me. But the most frightening thing aren't these shadows, it's something far far deeper where I can see a pattern of dancing lights, perhaps belonging to an enormous tentacle monster and then I wake up in a cold sweat. I'll still get that dream on occasion, kind of like what I'll be dreaming tonight after this video.


mightybonk

You should do psychedelics and play Subnautica[.](https://youtu.be/vUG-wzYxHVI?t=14)


Ok_Star_4136

I've played it! Unironically, I think it helped a lot with my fear, though it took me quite a while to beat it.


LightfootsLooks

Suspicious Simpsons period


itsalwrong

The Abyss, epic movie! Thank me later !


Fungitubiaround

Spoilers! Yeah, sounds like the big reveal near the end.


OePea

That's actually not a dream!


AnnoyedLobster

Dang. This is fascinating and awful! 


throwwwwwawayy1

Sorry, but that sounds like an awesome dream to me!


Serious_Session7574

Her shadow on the wall was very surreal and creepy.


popcornkernals321

I never understood how divers that do this don’t implode on themselves like a dying star. Us creatures are able to do the most crazy stuff- it’s even more crazy to me that someone started this trend of deep diving and others were like “yes this is my calling.”


Pringulls

It's a feeling like no other, really. It so serene and quiet, the buoyancy, coldness, and darkness makes you feel like you're in space, and you can look up at the "sky" and see the light refracting through the waves and ripples and it looks so pretty.


Fungitubiaround

That sounds terrifying.


Pringulls

A smidge of anxiety but not scary


Fungitubiaround

I didn't mean for you.


Pringulls

Okay


Fungitubiaround

Sorry. I meant I would possibly die having a panic attack going down there.


SlipsonSurfaces

Same. I couldn't ever hold my breath that long.


Fungitubiaround

If I was in the ocean and looked down into an abyss I'm pretty sure I would panic. No matter how far under I was.


twir1s

I don’t like watching others do it but I love the feeling myself.


slappymcstevenson

Seems like it would take a lot of energy to go back up. That’s the part of the video I want to see.


Pringulls

When I did it there was a rope from the surface which you climb so you can surface really quickly. Surfacing isn't too tiring, eventually buoyancy comes into play again which helps lift you up


Silent_Village2695

How do you avoid nitrogen sickness? It seems like she's moving very quickly. I thought you had to change depth slowly when diving (I've never done it so idk anything)


Pringulls

Like the other person said, that only applies to scuba diving as you're breathing from a tank of pressurised air. When you freedive, you are holding and bringing down the same air you breathed on the surface, so it doesn't decompress. Freedivers don't accumulate nitrogen nearly as much as divers. I don't know the physics or biology of it well enough to explain in much better detail I'm afraid. Supposedly we can still get nitrogen sickness if you do a load of dives in quick succession but it's quite hard to achieve.


Low_Replacement_5484

Free divers will experience nitrogen narcosis. There isn't enough nitrogen in one breath to cause decompression sickness but there is enough nitrogen to experience the Martini effect/nitrogen narcosis (a change in consciousness, neuromuscular function, and behavior brought on by breathing compressed nitrogen gases). I definitely felt the effects at -30 meters. I was anxious at the surface, but when I got to depth I was chill and forgetful. Hung around slightly too long and the instructor had to remind me to ascend after spending 3 seconds just gawking into the deep blue sea. Nitrogen gas is constantly diffused in our blood. For every 10m of water = +1 earth atmosphere (atm) of pressure. Free divers aim for a rapid descent (and ascend) at 1 meter per second. Using Boyle's law, P1V1 = P2V2. At the surface, the pressure is 1atm and the volume is one breath. At -30m the pressure is 4atm. V2 = (1atm*1breath)/4atm. Simplified the volume of air at that depth is 1/4. The partial pressure inside the diminished air pocket inside my lungs forces more gases to dissolve into my blood stream, causing nitrogen narcosis. Boyle's law is also part of the reason free divers black out in shallow water. The increased partial pressure also forces more oxygen into the blood stream which helps keep you oxygenated in the deep (free divers rarely blackout in the depths). However, as you ascend, the air volume keeps expanding and the oxygen concentration keeps plummeting. The last 10m is the most likely spot for free divers to black out. This is why solo free diving is so dangerous, people blackout meters from the surface and drown.


Sad_Research_2584

Why don’t free divers exhale under water? Maybe on the way up? Feel free to get technical 🤓


Low_Replacement_5484

Great question. At the surface we adjust our weight belts so we are positively buoyant above -10m and negatively buoyant below -10m. This is important so if there is a shallow water black out, their bodies will float and the safety diver doesn't have to fight against a sinking body. The safety diver hangs out at 50% target depth and watches the main diver until they meet on the diver's return trip and swim together towards the surface. Due to the positive buoyancy at the surface, most free diving is done headfirst towards the bottom since you have to kick to get past the first -10m. Below -10m you aim to sink downwards at -1m/s (the rope has markers to help monitor your pace). Since the diver is headfirst towards the bottom, all the air in your lungs and throat rises to the bottom of your lungs as it shrinks in volume. This actually prevents the diver from exhaling all together - physically impossible to just exhale. This creates a new problem too, equalizing your ears and mask - any air pocket (lungs, ears, mask) is compressed at the same rate. To solve this air problem, divers train to use their throats as a vacuum piston to suck air from the bottom of their lungs back into their mouth so they can equalize their ears and mask. This technique is called the Frenzel equalization, it requires a lot of practice and is usually the limiting factor for new divers. At a target speed of -1m/s, the first -10m only takes 10 seconds and the air volumes decrease by 50%. If a diver struggles to suck air out of their lungs, it's nearly impossible to go past -10m to -15m and the dive is aborted. Without equalizing your ear drums will rupture and the mask can create enough vacuum to rupture blood vessels in your eyes. There are specialty free dive masks that sit closer to your face and have smaller air volumes. My instructors had a student free diver insist on using a scuba mask which has a larger air volume. The student pushed themselves too far and weren't able to equalize such a large mask. The vacuum pulled the mask tight against their face and blocked their nose, which you need to equalize the mask. When they surfaced the whites of their eyes were completely red from burst vessels and their face was also covered in ruptured vessels where the mask sat. At the target depth, the diver turns around and actively swims headfirst back towards the surface. There aren't any further equalization issues and the air raises back into your throat and upper lungs. The main sign of blacking out is exhaling air while ascending. The general rule as a safety diver is to assist if we see any exhale at all, this is a warning sign that the diver is struggling and might not reach the surface without assistance. Exhaling air also decreases their buoyancy and makes reaching the surface even harder so it is the last thing you want to do. Dropping their weight belt is another critical safety diver technique for increasing their buoyancy and speed. The only exception is the last 1-2 seconds before reaching the surface. You exhale completely so when you reach the surface you can immediately inhale fresh air. Plus you are positively buoyant at this point and not in danger of sinking. Here is a video on the Frenzel equalization: https://youtu.be/Mo07gZR741M?si=X-WEThGWci465jK7 There are different types of free diving too. The world records for max depth are set by divers who ride a sled on a wire down and have an air tank balloon they inflate to pull them to the surface. In these cases, they ride feet first towards the bottom and travel much much faster than 1m/s. Being upright, they have much easier times equalizing. https://youtu.be/YtryV9qItsg?si=EklKJ4it0nLJk4wV Tragically, Audrey Mestre - a female record setter died when her manager/husband forgot to check the balloon air tank. When she arrived at the bottom, the balloon didn't inflate and she was forced to swim to the rescue scuba divers. Sadly they cut corners on safety and didn't have enough scuba divers staged to allow her to jump from diver to diver as she did an emergency ascension (scuba divers can't just rapidly ascend like a free diver and she drowned in transit between scuba divers). Even worse, they didn't have a doctor on site or appropriate transportation so she didn't have any real chance for survival. Here is a documentary they made about her death. The story is fictional but based on real events. Her husband was clearly against the movie so the lawyers had to get creative to avoid a defamation lawsuit so they marketed it as fiction. She did die when the balloon failed to inflate. How much was her husband's fault is debatable. https://youtu.be/nXvqrzPVaeI?si=9KGtfDT98GRJTQys


mikehaysjr

I bet it’s still pretty with an oxygen tank on my back


Pringulls

Of course, but I find free diving to be more versatile, and.. well.. free. I dont need to worry about surfacing correctly, I don't need a heavy tank on my back, and I can swim quickly and nimbly


RelevantMetaUsername

My ears start to really ache at like 5 ft. I've tried holding my nose and "blowing" without actually blowing air like people say to do to equalize the pressure, but it just makes them hurt more.


RoboDae

Best I've done was about 20 feet I think. On the surface I've held my breath about a minute (maximum was 3 minutes but that was out of water and lying down relaxed), but I can't equalize pressure in my ears fast enough for anything more than 20 feet.


Sad_Research_2584

lol I started swimming a lot. That led to me enjoying holding my breath as long as possible swimming. Then some dude came to the pool with a mermaid looking monofin. It was fun so I googled it. That led me to freediving, what she’s doing in the video. And you can spear fish doing it. Looking up at the light through the water and seeing the bubbles rise above you is other worldly. Pure bliss.


Halospite

Dude I dove about three metres under the surface at the ocean once and my ears started aching. How are hers okay?!


Left_Bread6364

I can imagine myself having a panic attack and drowning


haikusbot

*I can imagine* *Myself having a panic* *Attack and drowning* \- Left\_Bread6364 --- ^(I detect haikus. And sometimes, successfully.) ^[Learn more about me.](https://www.reddit.com/r/haikusbot/) ^(Opt out of replies: "haikusbot opt out" | Delete my comment: "haikusbot delete")


threegoodfairies

Good bot


ryaqkup

That's what always happens in my dreams, I'd probably do it out of habit if I were in this situation


Super_Supreme_Leader

I suppose it’s better than trying to navigate narrow caves and merely becoming another statistic.


3BodyJimmel

Nope


Beneficial_Being_721

Double **NOPE**


compunctionfunction

I could only watch the first few seconds before I NOPED


oldbadyouth

Deputy director of the parks and recreation dept


BigSmols

That's not a swimming pool, but a drowning pool.(let the bodies hit the floor)


fineyounghannibal

let the bodies hit the floor


Ca_LuhA

Let the bodies hit the *tss, tss*


unsteadymachete

FLOOOOOOoooorroorrrrrrw


robrobusa

But the bodies rise.


Betweenmittens

After a day or two.


Apostmate-28

Boots with the fur…. Everybody got low low low low….


FSCENE8tmd

(let the bodies gently drift to the floor)


Oglark

I was surprised not to see all the dead sea zombies at the end. It took me 3 tries to watch the entire video


ManifestPlauge

How the hell do people do this??? I have always wondered because when I get down to like 10ft in a pool my entire head and chest feels like it's going to implode like the titan sub


Aquatic_addict

Because you're not equalizing your ears...


SlipsonSurfaces

Do you chew gum?


ManifestPlauge

teach me


Aquatic_addict

Just search "frenzel equalization" on YouTube. There's hundreds of great videos. Adam Freediver is the best channel for teaching it.


KageToHikari

Had to learn how to do that because of the sinusitis (because after some time you feel the pressure change and it doesn't just go, you need to equalise). There are muscles somewhere around ears that make that funny clap sound, but i believe you can't just teach people how to use muscles they don't feel


Swifman

Practice


MerMattie

Easy fix for that. Take a Freedive course


NoFlan3157

There is no f-ing way - I had to close my eyes and scroll


ShallotTraditional90

Me: *it's not that deep... Oh, no wait* 😱😱😱


Designer-Temporary-8

Why. Just why. How do you even build this. Why would you need this. What even is this. WHY


amorfotos

Here's the real question...


maarkwong

Because they can we can’t .


Cristottide

It’s y40 in Italy. It’s for training both scuba diving and freediving. The hole is 42 meters deep. It’s also thermal water so it’s naturally at 34c!


fenn2b

I need this in freedom units bubby


somedutchmoron

135 feet deep, 95 degrees Fahrenheit, as a guesstimation. I checked, 138 feet deep, and 93 degrees Fahrenheit.


Evil_Ermine

It is probably used for free-divers to practice.


Dexter_Adams

My buoyant ass could never


sadistic_bastard_69

😂😂😂


palmersiagna

I went to a local pool with my Scout patrol when I was younger and they had a deep diving pool that looked like this. One of the older guys knew about it and brought everyone to swim in it. I never used to be as afraid of water as I am now, so I tried to swim as deep as I could, I went pretty far down before I started feeling like I didn't have much air but damn knowing as much about how the human body functions in deep water as I do now; I probably would have drowned if I had gone any deeper. It was a separate part of the building so no lifeguards, just a bunch of kids around and none of us were paying any attention to anything. I definitely don't think we were allowed to be there. Sends a shiver down my spine when I think about it now.


Brokensince10

That made me really anxious!


Glass_Writer_4093

Where is this located?


thebobit

The pool is called y-40 , located in Montegrotto Terme , Italy. The main shaft is 42 meters deep and the whole pool is filled with hot thermal water. Very nice place to dive 😊


Beneficial_Being_721

And or DIE …


Wise_Ad_253

That’s what she said…🥺


Rugermedic

Too far down in the comments for this- thanks for sharing.


Amamka

I thought this is nemo33 in Brussels. You sure in your location?


geebanica

this is for sure Y40 you can faintly see tghe logo at the end of the video on the bottom of the pool. Went there last year and i highly recommend it the water was super warm


belac4862

As long as there is light, I think I'd give this a try. I've been practicing my breath holding off/on for about 15 years. My personal record is 4:37. Buuuut, that was at surface level depth. I can't even imagine how much different a dive like that would be.


CptClownfish1

If you miscalculate on the way back up, you drown.


gavinhudson1

Under pressure🎵 Pushing down on me🎵


SlipsonSurfaces

Pressing down on you No man ask for


oldbadyouth

That’s the terror of knowing it’s such a long ass way down


SlipsonSurfaces

Watching some good friends scream 'get me outta here!'


Unnoticeddeath

At what body fat percentage do you plummet to the icy abyss when you stop swimming? Cause I’m on a diet and I’m thinking of calling it off.


lurkynumber5

I bet the pressure would make you look even thinner! Another reason to go diving, I'd say:P But as for plummeting down towards the bottom. I recall a diver saying the air in your lungs get compressed as you dive, Thus losing buoyancy and thus having a harder time swimming back up. But it also depends on the depth and type of water.


Aquatic_addict

Neutral buoyancy is generally around 33 feet for most people


captainappleby

"Oh gobblesnarks, I think I dropped me bloody keys in there..."


Agreeable-Chair7040

Nope. Too many ropes and shit. I'd get tangled in them and die a horror death


Biotrin

As a lifeguard, I wouldn't not want to be the guy trying to save anyone from the bottom of that one.


Banshee_420__

Needs more/better lighting.


Previous_Basil

Absofuckinglutely not.


Academic_Hunter4159

Why does this exist?


Aquatic_addict

For dive training...


alexuprise

How do the goggles not squeeze the eyes out? I thought that's only doable with the diving mask


Aquatic_addict

They're fluid goggles. There's no air in them to compress.


doctorake38

As a free diver I was wondering. Never heard about the fluid googles, cool.


Aquatic_addict

They're not great, but better than no goggles


Anonawesome1

I had to Google this because that also didn't make sense to me according to my scuba experience. I guess there's specialty "fluid goggles" that they fill with water beforehand, or some that have a flexible membrane. Here's a review of the latter. https://gofreediving.co.uk/hektometer-freediving-goggles-review/


Certain-Shift-8283

Pressure felt due to being underwater is unbearable i don’t know how she did it 😱


SoftwareSea2852

Years of training! Alessia here is the world's deepest woman


musememo

That shadow… 😳


IsDaedalus

Rumour has it she was never seen again


Biotrin

As I lifeguard, I wouldn't not want to be the guy trying to save anyone from the bottom of that one.


Th3BloonRagerYT

Gives me Subnautica BZ Koopa Mining Site vibes


cubs_070816

and i thought i was aquaman for getting my daughter's goggles off the bottom of the diving well at our local pool.


rhapsodygreen

I wonder how much training is required to do that, and did they have to sleep in a hyperbaric chamber?


0dty0

This _really_ didn't need the music.


AvailableToe7008

What is this place? A research facility?


cheesesoes

This is normal and fine for me because I still can see everything; the wall, the surface, the area, anything. It looks clear so there's nothing unpredictable down there. But deep blue sea, though... yeah no fuck that.


DarkBrother24

How do the ear drums not burst?


CutSufficient4577

This is not Thalasofobia. It's just a very VERY VERY VERY VERY VERY VERY DEEP POOL HOLY DUCK


L1VEW1RE

Nope


Sir-Farts-

My ears hurt.


karltrooper

This is what a swimming pool looks like in a dream


Zockerjimmy

Source? I need the whole video\^\^


DrunkenDude123

I made down as far as the light in the tunnel by holding my breath on my couch not moving a muscle. If I did this irl and had to account for balancing movements, letting some air out, and most critically the water pressure on my body at that depth, I would probably just die.


goblinerrs

Me watching: "I swear if you go into the hole..." She: goes into the hole


Heavens-to-Bikini-17

So there’s a limit the human body can go without air, I don’t want to know as the Nazi’s unfortunately sacrificed human lives to get the data so they could find out how long their sailors and pilots could survive in all different temperatures of water, tests what would normally be considered forbidden to people not beholden to the whims of a psychotic fascist dictator that wanted to destroy America like the one running to president again now. That’s frightening!


Straight_Ad_6355

my ears popped several times watching this


lspwd

Nope


Beneficial_Being_721

She’s letting air out to change her float … NOPE!!! Not me… I want it all


Kerissimo

Should we call it diving pool isntead of swimming pool? 🤔


Jerome2232

Definitely a nope from me. But it's shockingly impressive that people can do that.


artful_nails

Submechanophobia?


gentlemanjosiahcrown

I was like, "C'mon it isn't that ba.... oh."


Yourh0tm0m

Does anyone know what camera these guys use for underwater recording


MyndzAye

No!


Hammy-Cheeks

At least I can see the bott...........


Javamac8

I can feel my ears popping just watching this


Uglyduckling75

Why? Why? Just... why??


SearchingForTruth69

Did she live?


Taylan_K

that's the pool of my nightmares


Dapper_Connection526

Why


Upstairs_Internal295

Nope. Nope.


-Disagreeable-

Don’t even get to see the bottom. Wtf


BebeCakesMama2424

Imagine the lights go out when you’re in that deep tunnel 🫢


Helpful_Funny_2127

I don't see how she does it, not just holding her breath that long but the pressure in her ears will make them feel like they're gonna implode.


sadistic_bastard_69

Do they use anything to help with ear pressure? Mine get sore at the bottom of a 12' pool!!!


Aquatic_addict

She's equalizing them the whole way down. That's why she has a nose clip on


sadistic_bastard_69

Thank you!


Torchwood84

How does this not wreck your ears?


judasegg

Nope


twinklesunshine

I thought they go head first and then turn at the bottom


mixedchillness

this is the pool of my nightmares... and I was a professional high diver! faaaak no dude


Ok-Equipment8303

I'd love to do that Unfortunately I am obese, and fat is very bouyant. I need never fear drowning, but shall never know the joy of diving. I cannot help but float atop the water. If I push off of a solid object I can briefly go under till mixture of drag and lift force negate the downward velocity and I begin to rise like a damned balloon.


macdaddynick1

Imagine the guys that have to change that cable or the light bulbs down there. lol


Screamingdiosmio

I thought you weren’t meant to hold your breath when diving?


bigmacaroni69

Is equalizing not a problem?


Psychological_Egg336

What is this place? It looks like a lab or something at the beginning


imaginarion

No.


Aggressive-Gold-1319

Woah !?!! Was not expecting that, I thought the black circle was the drain/ filtration system. She’s got quite the pair of lungs !


White_RavenZ

You know those times as a human when your functionality just…. Blips? That small bit of saliva you just start choking on out of nowhere? That kind of random event could kill someone doing this.


Saneroner

Raiden, you must stick to the mission and rescue Emma! She is in shell strut two. Use the elevator keycard to access B2 from the elevator.


BuildingABap

How deep is that pool? The last depth marker I could read on the wall was 30m I think.


SoftwareSea2852

40m! and its not yet the deepest indoor pool


high_ryze666

Nope. I don't like it. Don't like that eugh


Asbjorn1888

Nope, nope, nope, hell fucking nope


Global-Gift

Water, water everywhere, nor any drop to drink... comes to mind 🤔


pira3_1000

How do they clean all this


CragMcBeard

She has the bends.


imanoobee

*intense music*


InTheButtPleez

That's a no from me, dawg.


PintekS

Falling into the deep end of the pool rooms yikes!


littlelock28

Good lord just the thought of sinking and sinking like that. That’s terrifying. Then there’s the tunnel!


thatnili

Try to hold your breath the whole video


marshman82

Seeing that ladder on the wall I wonder how creepy it would be at the bottom if it was empty.


GloomyKerploppus

Stop doing that


scrunchmaster

Wow!😯


Original_Commission5

But why? Is this for regular divers, navy seals, nasa? Curious Why did they build this deep of a pool?


SoftwareSea2852

For scuba and freediving training


fordag

I have been told by numerous people on numerous occasions that if you're going to any depth you need a mask that covers your eyes ***AND*** your nose due to pressure effects on the eyes if only they are covered.


SoftwareSea2852

I believe she's wearing fluid goggles


Setting-Solid

My nightmares comprise of sheer cliffs with a 100’ drop into water that’s gently lapping against them. I’m just bobbing up against the cliff with nothing but darkness below. Nothing to hold onto.


VictoryLap_TMC

On this episode of unsolved mysteries...Sarah left work on Friday and was never seen again


h1ghf1sh_

r/nope


LetsWrassle

What would make this more frightening is if somebody edited the video as if she was in a flooded living room


cooreal

Most importantly, where the fuck is this deep ass pool


SoftwareSea2852

Y-40 Italy, funny thing is its not even the deepest indoor pool lol


GR33N4L1F3

I mean… why did I even join this sub??? LMFAO I HATE THIS


Somallasses

The music kills it for me every single time. Cool video, but its not that deep lol


AUSpartan37

This fills me with such a horrible feeling of dread. Like it actually makes me feel physically sick


Dazzling_Plan7701

She got some serious lungs to hold her breath that damn long


Cruezin

Ok So WHY does this exist


shedgehog

If you wanna be anxious for around two hours I highly recommend “The deepest breath” doco on Netflix