Just.. wow.. This video is perfect.
Because of the comments I expected a huge fart or puke from the hole he used to pump himself from, but it is soooo much better.
I wonder if he tried this with helium, and how much he'd have to inhale in order to float. I think if he can increase his capacity by about 8 to 10 times, that should do it. But that's just a rough estimate, I'm probably way off.