I'm going to repeat something I heard as a kid and I bet you've heard this too - "some of the best shows on television have a 'show within a show' as part of the plotline". You know what I mean, The Simpsons were inside "The Tracy Ullman Show" until they spun off into TV history.
Think about it, some shows are so good that the writers insert a "gag show" as a tool for quick laughs.
My favorite will always be "Psycho Dad" from "Married . . . with Children". What makes Psycho Dad so much fun is you never actually see the show, you only hear the intro theme song. Love the way Al sang along with his hands as index finger guns. Sometimes he looked at Peg but he was thinking about Darcy, lol.