My "I was there when Nirvana played their first gig" story is I got to see Joel live on stage during the tour billed on the premise this was the last time he'd put on the jumpsuit and play the Joel character live.
Even if Gizmoplex kind of made that less special 'cus he's still riffing anyway.
It pains me the funniest single joke I've seen in MST3K history was at a live show that wasn't recorded so there's no evidence of it.
During a climactic battle, the protagonist's weapon runs dry and he throws it out of frame down a corridor, out of frame.
Tom shouted "Hallway, cover me!"
