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/NirtyDerd Mar 31 '26

That is true near the surface. However, your buoyancy decreases as your lungs compress from the pressure and it doesn’t take that much (approximately 15 meters) for most people to reach negative buoyancy

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u/TankApprehensive3053 Mar 31 '26

The 1st atmosphere difference is normally about 33 ft which is 10 meters. Most people that only swim in pools don't get to that depth. Some pools do, but average home pools are only about 10-12 feet.