Backroom Video Thread

[Lemur]

I don't know a lot about scuba or diving, but shouldn't this sort of thing be, I dunno, physically impossible? More than six hundred feet down on a single breath? Isn't there a phenomenon called the bends? I thought once you got more than two hundred feet down you had to worry about nitrogen bubbles forming your blood and agonizing, crippling pain. Can someone explain to me how this guy does this and lives?