Quite a few years ago now, we worked and had a few memorable experiences with a rather heavy set drummer. Here are some stories:

It was the end of the night, and the last song for the gig. The drummer stood up in place to execute a roll on the cymbal to end the song. We got a nice audience response in reply, and as the drummer sat back down on his drum stool, the seat cracked and the shaft of the seat seriously went up his butt. We couldn't get it out and had to take him to the emergency room at the hospital to get it removed.

We played a Christmas party at an American Legion. Same drummer dressed up like Santa Claus for the gig to add a little festiveness to the show. A man in the audience got really drunk that night and somehow managed to start an argument with the drummer as they stood in the middle of the dance floor area. The argument turned physical and it was quite a strange sight to see Santa rolling around on the floor with some guy as he was pounding the crap out of him at a Christmas Party.

Same drummer, and the band was playing for a benefit in a gym at a local
high school. The benefit included free draft beer for the members of all of the participating bands who came out to play on their own time for the benefit. The benefit had started at noon and our band was next to the last
to finish out the event, which put us up on those risers at about 8 in the evening. The drummer had been drinking the free draft beer since noon.
Half way through our show, the drums stopped playing and we all turned around to see why he stopped playing. He had totally "vanished". With a pause in the show and a little investigation, we discovered that he had passed out from drinking and fell backwards off the riser and was laying on the floor out cold, and out of sight.