Harry does an impression of the Fonz.
When Don enters the bar, all of the patrons yell out, "Don!"
In his new job as a bartender, Harry, like Tom Cruise in "Cocktail," attempts to toss a bottle to another bartender, but he breaks it.
Dick's pitch speech for Physics spoofs Harold Hill's speech: "Inertia! With a capital 'I' and that rhymes with 'PI' and that starts with 'P' and that stands for 'Physics!'"