Marty McFly: I don't understand this, Doc. How can this be happening? It's like we're in Hell or something.
Doc: No, it's Hill Valley. Although I can't imagine Hell being much worse!

Oh and Marty, be careful around that Griff character, he's got a few short circuits. In his bionic implants.

Doc

Old Biff: You always did have a way with women.
Young Biff: Get the hell out of my car, old man!
Old Biff: You wanna marry that girl, Biff? I can help make it happen.
Young Biff: Oh, yeah, who are you, Miss Lonely hearts?
Old Biff: Just get in the car, Butthead.
Young Biff: Who are you callin' "butthead." Butthead?

Young Biff: How do you know how to do that? Nobody can start this car but me.
Old Biff: Just get in the car, Tannen. Today's your lucky day.

Marty McFly: I had a horrible nightmare. It was terrible.
Lorraine Baines: Well, you're safe and sound now. Back on the good old 27th floor.
Marty McFly: 27th floor?

Hey, the big M! How's it hanging, McFly?

Needles

Wow! Since when did you become the physical type.

Griff Tannen

Biff Tannen: Where is he?
CPR Kid: Who?
Biff Tannen: Calvin Klein.
CPR Kid: Who?
Biff Tannen: The guy with the hat. Where is he?
CPR Kid: Oh he went that way. I think he took your wallet!
[to camera]
CPR Kid: I think he took his wallet.

Marty McFly: Cubs win world series against Miami?
Old Terry: Yeah. Who would've thought? 100 to 1 shot! I wish I could go back to the beginning of the season, put some money on the Cubs.
Marty McFly: I just meant Miami ... what did you just say?
Old Terry: I said I wish I could go back to the beginning of the season, put some money on the Cubbies!

Biff Tannen: Go ahead, kid! Jump! A suicide will be nice and neat.
Marty McFly: What if I don't?
Biff Tannen: Lead poisoning.

All too easy.

Darth Vader

Young Jennifer: I'm old!
Old Jennifer: I'm young!

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