I've known about freediving since I saw a segment about it on Wide World of Sports (memba that?) oh, say some time in the early nineties. I knew they were crazy then, and I know they're crazy now. Pushing down into the ocean so deep you can't tell which way is up is not my idea of courage. It's more like suicide. But hey, if they're all adults and they're having fun doing it, who am I to judge?