[Biff is waxing George's car, it's a silver BMW] George McFly: Uh... now Biff, I want make sure that we get two coats of wax this time. Not just one. Biff Tannen: Just finishing up the second coat now. George McFly: Now Biff, don't con me! Biff Tannen: I-I'm-I'm sorry, Mr. McFly. I-I meant I was just starting on the second coat. George McFly: Ahh... Biff. What a character. Always trying to get away with something. I've had to stay on top of Biff ever since High School. Although if it wasn't for him... Lorraine Baines: We never would have fallen in love. George McFly: That's right.
George McFly: Lorraine, my density has bought me to you. Lorraine Baines: What? George McFly: Oh, what I meant to say was... Lorraine Baines: Wait a minute, don't I know you from somewhere? George McFly: Yes. Yes. I'm George, George McFly. I'm your density. I mean... your destiny.