Frank Zappa. Appearing as both the host and musical guest for the October 21, 1978 episode, Frank Zappa made few friends in his last SNL appearance before his ban. Zappa allegedly didn't mesh with the cast and crew in the preparation week, then mugged for the camera and made it obvious that he was reading cue cards during the broadcast. Not only was Zappa banned from the SNL stage after the stunt, but most of the cast refused to interact with the performer in the "goodnight" segment to end the show.