That's-that's school property there, and it doesn't belong to us. It's something not to be toyed with.
7 seconds sound clip from the The Breakfast Club movie soundboard.
You can hear this line at 00:16:09 in the Blu-ray version of the movie.
Quote context
[...]
- Shut up.
- There's not supposed to be any monkey business.
- Young man, have you finished your paper?
- Come on, Bender. Don't screw around.
- That's very funny. Come on. Fix it. You should really fix that.
- Everyone, just shh. I've been here before. I know what I'm doing.
[...]