Brother, you're serious.
3 seconds sound clip from the Instant Kung Fu Man movie soundboard.
You can hear this line at 00:06:36.943 in the DVD version of the movie.
Quote context
[...]
- You can show us how much you've learned.
- Teacher, I've gotta go, I can't hold it.
- You have to learn to hold it.
- Lu Kung, you can fight with Shao Hu.
- Sir.
- Brother, I'm afraid I might you hurt you.
- Brother, you must take it easy.
- Brother, you won't make any more jokes next time.
- Hold it. Come here. Now run up your sleeves.
[...]