When Happy Days ruled the airwaves, Fonzie was THE man. Every guy wanted to be him and every girl wanted to be with him. As a result, every time he first entered the action in any episode, the live studio audience would go insane, resulting in him having to wait a beat or two until he could utter his catchphrase- "Aaaayyyyy!" which would then prompt a new cascade of cheers and applause from the audience.
This expectation eventually became a crutch for the show; pretty much anytime anyone entered a room on the show, the audience was encouraged to act like Elvis and the Beatles had simultaneously taken the stage. The writers could probably rely on five minutes getting filled with applause from the crazed audience. That's what we here at Temporary Layoffs call a "Fonzie Entrance," in honor of one of the first characters to inspire live studio audiences to act like crazed hyenas. This phenomenon was perfectly lampooned in the Lovematic Grandpa segment of The Simpsons when Homer enters Moe's Tavern.
