I've dealt with a fatty (230 lbs or something) puking all over at my former job. That was horrific. Didn't help that the night staff had left the puke to harden up and fester for a few hours (to this day, if I find out who it was that did it I'll kick their asses). She had just eaten something spoiled, so nothing more happened the rest of the day. I can't imagine a bigger person being really sick, honestly.. It sounds as if it'd be like the porn video you saw but x50.