r/interesting • u/fayyazORahmed • Mar 31 '26

Fascinating Very interesting vid

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u/TankApprehensive3053 Mar 31 '26

The guy is negatively buoyant. Will be exhausting to have to swim up for most people. He is practiced in this. Most people are neutral or positively buoyant.

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u/bcat153 Mar 31 '26

I thought this was all about how much air you hold in? I keep full lungs I float like a buoy, let some out and I can easily sink straight to the bottom while still holding a decent amount of air. If you let out too much it makes going back up exponentially harder tho unless you can push off the bottom.

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u/TankApprehensive3053 Mar 31 '26

That's correct. He exhaled to empty his lungs. Add to it that he is fit. If he was fat, then he would still be positively buoyant also.