A breath holding competition without taking a single deep breath?!!!!!!
Anyone who practices diving with apnea (swimming with no air tank) can tell you NOBODY does it before warming up their lungs and taking several deep slow (no hyperventilating) breaths, as many as 40 before your first attempt.
So watching these guys go at it in the bar without even taking one single deep breath (you see them clearly all serious holding still and apparently not even breathing at the moment the water rises to cover their faces), is simply beyond stupid. NO ONE can hold their breath that way for 5 minutes, heck not even one (I can hold it for 4, but only after 2 warmup attempts without any air in my lungs, which take like 8 minutes overall).
Why not just make them float in the air while they are at it?