The live version of "Supper's Ready" on the box set has Peter break into his usual pre-song story, which is supposed to be punctuated by Phil's drumming at two points. Phil apparently missed the cue, and the result is hilarious.
Peter: "Phil, there's people out there!"
Phil: "I'm really sorry, everyone. I wasn't paying attention to what he was saying."
The second time around, Phil gets a massive round of applause when he actually comes in on cue.
Speaking of "Supper's Ready", there's the "Willow Farm" section, both in regards to both the music itself and for Peter prancing about as a flower.
"Winston Churchill dressed in drag, he used to be a plastic bag, British flag, WHAT A DRAG!"
One bootleg features an audience member shouting something that can't quite be made out. Gabriel's very calm, deadpan reply was, "My mother does not suck cocks.".
"Jesus He Knows Me" mixes an absolutely hilariousvideo with a vicious lampooning of televangelism.
The video for "I Can't Dance" had many of these, and the video for "Anything She Does" features Benny Hill doing his usual shtick.