At Arnold's Drive-In, there is a jukebox in the corner on the left of the bathrooms. The jukebox has played several songs, including Hound Dog, Personality, and Exit. It is coin operated, but can be turned on by punching it, but only Fonzie can do that. Warren "Potsie" Weber has tried, but it didn't work. Also in Fearless Fonzarelli: Part 1, Fonzie forgot how, but remembered in Fearless Fonzarelli: Part 2. Fonzie can also turn the jukebox off by punching it. This ability is known as the "Fonz Touch".
The first time Fonzie punched the jukebox occurred in the Season 2 episode, “Fonzie’s Getting Married” (interestingly enough, also the first episode taped live in front of a studio audience), where he wanted to announce the news, so he hit the jukebox to turn it off so that everyone could hear his big news about him getting married.