Wow, these are some awesome stories guys. Kind of makes mine sound juvenile....
Let's just say that myself (guitar) and the other guitar player might have had a bad drinking problem... Our band would usually have a decent time, either headlining or right before the headliner, so we would sit at the bar and get plastered. Usually, there were no problems. It always seemed that we played "tighter" when he and I were drinking. (Probably 'cause we were so wasted that we didn't give a shit, but hey, it's all good.) WELL, this one night, instead of only drinking beer, we just used the beers to chase the shots of Jack. During this one song that really got us all hyped (we played upbeat alternative) I got up on the drum riser and did one of those "rock star, kick your feet up behind you" kind of jumps... When I landed I tripped over my own feet and, in an effort to save my SG from any possible damage, landed pretty much on my face. I jumped up as fast as I could, but my nose and mouth were bleeding, and the people in the front were on the floor laughing.
And one more...
I was in a country band bad in high school and we had regular weekend gigs at this biker bar that was close to our practice room. Our singer had a false tooth, on one of those wire things that clips into your mouth. During one of the songs that thing went flying out into the audience, and as we kept up the song, he proceeded to drop his acoustic and literally get down on his hands and knees to search for the thing. We ended the song without the acoustic or vocals, again, with everyone laughing.