Big House Bunny (1950)

Bugs Bunny escapes hunters by leaping into his rabbit hole and tunneling to safety. Unhappily he tunnels into the Sing Song prison where a sadistic prison guard named Sam Schultz refuses to accept that he's anything but one of the prisoners. Soon Bugs is in stripes, but it's the guard who will find prison life to be hell when Bugs Bunny is around to trick him into a cell, the hangman's noose, an electric chair and even into the warden's office, where Bugs will put a severe strain on the relationship between boss and underling. Finally, Sam decides that enough is enough.