Marty McFly: Let's go over the plan again, so eight-thirty where are you going to be?
George McFly: I'm gonna be at the dance.
Marty McFly: And where am I gonna be?
George McFly: You're going to be in the car with her...
Marty McFly: Right, so right around nine o'clock she's going to get very angry with me.
George McFly: Why would she get angry with you?
Marty McFly: [reluctantly] Because, George, nice girls get angry when guys take advantage of them.
George McFly: [Realizing] Ho! Hooo! You-you mean you're going to go touch her on her -
[gestures at a bra in his hand]
Marty McFly: No, no, no listen, George it's just an act! Okay? So around nine o'clock you're walking through the parking lot, you see us... struggling in the car. You walk up, you open the door and you say
[pause]
Marty McFly: ... your line, George!
George McFly: Oh! "Hey you! Get your damn hands off her!"