Fonzie briefly impersonates the famous DJ Wolfman Jack in this episode. A few years later, Wolfman Jack would be the narrator of the animated spin-off series "The Fonz and the Happy Days Gang."
When Henry Winkler (Fonzie) pretends to change the radio station he says "hey this is Wolfmam Jack don't touch that girl". This is a reference to American Graffiti which stars Ron Howard (Richie)