Marty! What in the name of Sir Isaac H. Newton happened here?

Doc

Young Doc: No! It can't be; I just sent you back to the future!
Marty McFly: No, I know; you did send me back to the future. But I'm back ... I'm back from the future.
Young Doc: Great Scott! [faints]
Marty McFly: Doc! Doc! Doc!

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

Biff Tannen, I wouldn't marry you if you had a million dollars.

Lorraine Baines

Young Biff: Why don't you make like a tree and get out of here?
Old Biff: It's leave, you idiot! "Make like a tree, and leave." You sound like a damn fool when you say it wrong.
Young Biff: All right then, leave! And take your book with you!

[watching chase unfold in 2015] There's something very familiar about all this.

Old Biff

I have your car towed all the way to your house and all you've got for me is *lite* beer?

Biff Tannen

S. S. Strickland: So you're the son of a bitch who's been stealing my newspapers.
Marty McFly: Mr. Strickland! It- it- it's me, sir. Marty McFly!

S. S. Strickland: Who?
[jabs Marty with shotgun threateningly]
Marty McFly: Marty McFly! Marty McFly! Don't you know, Mr... From school, sir!
S. S. Strickland: I've never seen you before, but you look to me like a slacker!
Marty McFly: Yeah! That's right! That's right, I am a slacker! Don't you remember, you gave me detention last week!
S. S. Strickland: Last week? The school burnt down six years ago! Now you got exactly three seconds to get off my porch with your nuts intact!

Lorraine Baines: Are you all right?
Marty McFly: I'm fine, I'm fine. It's just that you're so... big...

Tardy slip for you, Miss Parker. And one for you, McFly. I believe that makes four in a row. Now let me give you a nickel's worth of free advice, young man. This so-called Dr. Brown is dangerous, he's a real nutcase. You hang around with him, you're gonna end up in big trouble.

Mr. Strickland

George McFly: I know what you're gonna say, son. And you're right, you're right. But uh... Biff just happens to be my supervisor, and I'm afraid I'm just no good at... confrontations.
Marty McFly: The car, Dad. I mean he wrecked it. He totaled it. I needed that car tomorrow night, Dad. Do you have any idea how important this is to me? Do you have any clue?
George McFly: I know, And all I can say is... I'm sorry.

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