well, several of my friends and i decided to have fun and play jackass so we each got a gallon of milk and started chugging away. we're all athletes and one plays football. he wins of course, but i've never seen a guy puke out soo much before. we did all this at a park and the grass became all "muddy" once we were done. i was able to drink 3/4ths of a gallon without throwing up, so i won for holdin the most in. i'm 5'11 and weigh 155-160 and i held in more then even my football friend who weighs 220. all in all, it was fun. take my word for this guys: NEVER, EVER DO THIS! throwing up hurts like crap, especially when you're trying to drink a gallon of milk!