Mmmm, I don't know about that.
Unless you're in a full suit, how are you keeping the mouthpiece in?
Mr. Ball was, by all accounts, a masterful scuba diver. I can definitely see it happening. I practiced on the bars in Phillips quarry in Muncie until I was pretty good at the buoyancy thing, but I'm still a piker compared to some of these guys and gals. That's the hard part of it to me. If you've got a good fitting regulator, it's pretty easy to keep it in your mouth.