Well, competitive eaters have been accused of having stomach expansion surgery. No joke.
One thing I really really wish would be a "thing" locally is organized hill climb stuff. We've got a few 2 to 3 minute hills that'd be good for it. I say this as they just announced the British winners yesterday I believe. Absolutely stunning efforts.
I've done close to 450 for 2-min before (well, 1:45). These folks are pushing (at their weights) around that much for 11 to 12 minutes!!! Geeesh. Well down in the 60's probably on kg's of weight. I just can't imagine.