- You won't dance? Come on.
- No, really, I'd like to, but I can't. If old Mr. Simpson came in here, and saw me dancing with one of you sexy little... Excuse me. One of you young ladies, he'd have my rear end.

12 seconds sound clip from the American Graffiti movie soundboard.

You can hear this line at 00:23:47 in the Blu-ray version of the movie.

Quote context

[...]

- Don't make a scene.

- Go ahead. Slug me. Scar my face! I wouldn't dance with you if you were the last guy left in this gym.

- This is getting good.

- Come on, Eddie, I'll dance with you. You don't mind, do you, Peggy?

- Joe College strikes out.

- Curtis! Curtis, come here. Help me, will you? I'm surrounded. Come here.

- You won't dance? Come on.

- No, really, I'd like to, but I can't. If old Mr. Simpson came in here, and saw me dancing with one of you sexy little... Excuse me. One of you young ladies, he'd have my rear end.

- Hey, Warren. Come on, gentlemen, back inside. Put it out. Let's go. Kids.

- Want a cigarette?

- All right.

- I thought you'd left.

- No, not yet. I have no matches.

- That's all right.

- Brother, how do I get stuck with dance supervision? Will you tell me that?

[...]