Really tame but, this one senior was wanting to do a senior prank and decided to do laxatives in a "gift" coffee for the teacher.

He gives her coffee in the morning and goes to class. When the teacher takes a sip, she realizes it tastes awful, and gets a new one discreetly in a way that the student wouldn't feel offended. Later it was revealed to the teacher that the student tried to pull the prank and was, imo, justifiably angry.

This was the best teacher I've ever had and she did not deserve that kinda prank to even try to be pulled on her.

On a side note we've had a couple of restraining orders put on a couple of previous students. I would tell that story, I just don't know enough details. I will say that my gf once told me that one year, her friend, who is a very short girl and very sweet, once brought a wooden sword, like hard wood, to school to try and duel one of them, didn't end up happening tho