Rosemary: Who do you think you are, checking out my niece Kathleen?
Fonzie: No offence, nice lady, but when you buy a car, you check under the hood.
Rosemary: Listen, ducktail...
Richie: (holding back Fonzie) Take it easy, take it easy. She's a woman, okay?
Rosemary: If anybody checks under Kathleen's hood, they're going to get a dipstick up their nose.