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

Doc: However, the destruction may be very localized; limited to merely our own galaxy.
Marty McFly: Well that's a relief.

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?

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

Doc

Marty McFly: Ah, Jesus Christ! Jesus Christ, Doc, you just disintegrated Einstein!
Dr. Emmett Brown: Calm down, Marty, I didn't disintegrate anything. The molecular structure of both Einstein and the car are completely intact.
Marty McFly: Then where the hell are they?
Dr. Emmett Brown: The appropriate question is, "WHEN is the hell are they?" You see, Einstein has just become the world's first time-traveler! I sent him into the future. One minute into the future to be exact. And at precisely 1:21 am and zero seconds, we shall catch up with him and the time machine.

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!

Marty McFly: The 'Sports Almanac'. Son of a bitch stole my idea! He must have been listening when I... It's my fault! The whole thing's my fault. If I hadn't have boughten that damn book, then none of this would have ever happened.
Doc: Well, forget it Marty. That's all in the past.
Marty McFly: You mean the future.
Doc: Whatever! It demonstrates precisely how time travel can be misused, and why the time machine must be destroyed, after we straighten all of this out.

Dr. Emmett Brown: Oh, my God, they found me, I don't know how, but they found me. Run for it Marty!
Marty McFly: Who? Who?
Dr. Emmett Brown: Who do you think? The Libyans.
Marty McFly: Holy shit!

Dr. Emmett Brown: I suppose Jane Wyman is the First Lady!
Marty McFly: Whoa! Wait! Doc!
Dr. Emmett Brown: And Jack Benny, the Secretary of the Treasury.
Marty McFly: Doc, You gotta listen to me.
Dr. Emmett Brown: I've had enough practical jokes for one evening. Good night, Future Boy!

Marty McFly: Mom, I just want to know one thing. Where's my father? Where's George McFly?
Old Lorraine: Marty... George... Your father is in the same place he's been for the past 12 years... Oak Park Cemetery.

Mr. McFly! Mr. McFly, this just arrived. Oh, hi, Marty. I think it's your new book.

Biff Tannen

Marty McFly: Where are we? When are we?
Doc: We're descending towards Hill Valley, California, at 4:29 pm, on Wednesday, October 21st, 2015.
Marty McFly: 2015? You mean we're in the future?
Jennifer: Future? Marty, what do you mean? How can we be in the future?
Marty McFly: Jennifer, I don't know how to tell you this, but... you're in a time machine.
Jennifer: And this is the year 2015?
Doc: October 21st, 2015.

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