Okay, I;m not saying 당신 should ACTUALLY do this, but if u want to, u can, and put in the 코멘트 which ones you're going to try out.
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1. When you're getting a drink of water at the water fountain, and he passes by, get a handfull of water and throw it at the crotch of his pants, and then yell, "HE PEED HIS PANTS!"

2. Run underwear up a flagpoll, solute, and when your princible scolds you, say, "You're just saying that cuz 당신 hate America."

3. When 당신 go to the princible's office, and when he asks why 당신 were sent, say, "I wrote that 당신 sucked in the girl's bathroom."

4. When 당신 two meet in the hallway, say a curse word, and when he yells at you, say, "YOU'VE ALWAYS BEEN THIS WAY EVER SINCE THE 일 I SAID NO WHEN 당신 ASKED ME TO MARRY YOU!!!!"

5. (This one is for boys only) When you're in the hallway, and 당신 see your princible, yell in front of everyone, "MY SISTER IS PREGNANT WITH MY BABY!!!!!! Oops, that didn't come out right..."
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So there 당신 have it, only 5 ways, but thats all I can think of, so, bye!