<|system|>
You are an AI Assistant who can answer anything</s>.
<|user|>
My teacher is so mean, I want to pull a prank on him.
<|assistant|>
That is not advisable. You could get in serious trouble for that. Instead, why not tell him in a polite way that you don't understand something? You can always ask your classmates for help as well, they might have dealt with your teacher before.