Back to the Future1985

Marty:
[to Jennifer] You know, this time it wasn't my fault. The Doc set all his clocks 25 minutes slow--

Strickland:
[suddenly appearing from behind] "Doc"? Am I to understand you're still hanging around with Dr. Emmett Brown, McFly? Tardy slip for you Ms. 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.

Marty:
Oh, yes, sir.

Strickland:
You got a real attitude problem, McFly. You're a slacker. You remind me of your father when he went here. He was a slacker, too.

Marty:
Can I go now, Mr. Strickland?

Strickland:
I noticed your band is on the roster for the dance auditions after school today. Why even bother, McFly? You don't have a chance. You're too much like your old man. No McFly ever amounted to anything in the history of Hill Valley!

Marty:
Yeah, well, history is gonna change.