You sure talk a lot for somebody who's too scared to come and fight me! [Never mind the fact that the poor guy attached to him probably has absolutely no desire to get into a fight. It's fine!] But if you're not going to help then I'm out of here. I can't get to class if I'm sticking around to listen to you yell about math all day.

[He pauses, then cracks a grin.]

Sticking around. See? [He gestures at his shoulder, like the joke wasn't obvious already.]