During one memorable episode, broadcast live, guest star Andy Kaufman broke character during a sketch. He got into a shoving match with Michael Richards which degenerated into an on-camera brawl. It was later revealed that this was a set-up and Kaufman and some of the brawl participants and the cast were in on the gag, but most of the crew were caught completely off-guard. Melanie Chartoff discusses this in an interview with David Brody found on Youtube.