For this skit, you need a character from a known skit -- one that was done previous to this one during the campfire, for instance. It doesn't matter who it is or what he's doing, as long as he's immediately recognizable, and of course you use the punch line, "(Looks around; in normal voice,) Oh, sorry! I'm in the wrong skit!"
Cast: Announcer, Peanuts
Announcer: Ladies and Gentlemen! Boys and Girls! Welcome to the Greatest Show on Earth!
Tonight's show will include ….
Peanuts: (Stumbles in with ripped shirt, backwards pants, beat up, in cuckoo voice.) Judge! I like to smash Peanuts with a hammer ... (Looks around; in normal voice,) Oh, sorry! I'm in the wrong skit!