We didn't do much, but I was a bit of a prankster in those days (who's kidding, I still am!) We had a principal who looked very much like Professor Snape from Harry Potter, so I hung up a bunch of flyers with just a picture of professor snape all around the school. The teachers got a kick out of it. I was generally a good kid, but this principal had a beef with me. She had also been my 7th and 8th grade history and science teacher.
During actual graduation, we were told no balloons and beach balls. Of course everyone snuck them in anyways. Someone even had a blow up doll.
My last jab at the principal (who was attempting to take a last jab at me I think) involved my graduation speech. I was Salutatorian and spent a lot of time writing up a speech that I knew would mean a lot to all the people who made a difference in both mine and my classmate's lives. When we were practicing our speeches the morning before graduation, the principal told me I had to rewrite the speech. I was so upset because I put so much time and emotion into my speech. I went home nearly in tears to my mom and she told me to give the speech anyway. So I did and EVERYBODY loved it. The best part was when the superintendent, who I had a lovely relationship with, congratulated me on my speech and told me it was one of the best he had ever heard...right in front of Snape! Oooo, her face was excellent.
) but we play the pe*is game. The rules are : 1.) Shout pe*is as loud as you can before the teacher says anything 2.) dont play it while the principal is in the room, it just doesnt work out. ( On the school bus is pretty fun 2! )
especially if multiple people are in on it, and when people are shouting as loud as they can! 
