You realize what would happen if I hand in my homework in your handwriting? I'll get kicked out of school.
7 seconds sound clip from the Back to the Future movie soundboard.
You can hear this line at 00:39:04 in the Blu-ray version of the movie.
Quote context
[...]
- You got my homework finished, McFly?
- Well, actually, I figured since it wasn't due till Monday...
- Okay.
- I got to have time to recopy it.
- You wouldn't want that to happen, would you? Would you?
- Now, of course not, Biff. No. I wouldn't want that to happen.
- What are you looking at, butthead? (2)
- Biff, get a load of this guy's life preserver. Dork thinks he's going to drown.
- How about my homework, McFly?
[...]