We know. He is one of your fellow students. You're not in a position to teach him a lesson.
9 seconds sound clip from the King Boxer: Fingers of Death movie soundboard.
You can hear this line at 00:49:44 in the Blu-ray version of the movie.
Quote context
[...]
- The guy's a lazy bastard. It's just that he knows how to handle Suen Hsin-pei.
- That sounds like really bad news.
- Come on, why don't you teach him a lesson? Or is it that he is so good that you wouldn't dare?
- What do you mean, afraid of that guy?
- Nearly finished him. Knocked him down in one blow.
- We know. He is one of your fellow students. You're not in a position to teach him a lesson.
- Look here. I don't exactly love the guy myself.
- I don't mind having a go at him for you.
- Hey, a girl asked me to give you this letter.
[...]