[flashback to 1976:]
Kelso: And then Potsie says, "Sit on it." [laughs] Right to the Fonz's face! Now, that's brave.
Hyde: Hey, what's with Donna?
Eric: What? We're just friends. God, why would you even ask that? I don't like her. Me and Donna? It's- It's gross!
Hyde: Hey, man, I was just asking why she wasn't in class today.
Eric: Oh. Well, then, never mind.
Kelso: Busted!