My Funny Picture - What are some great senior pranks to pull that do not involve vandalism?

What are some great senior pranks to pull that do not involve vandalism?

Public Comments

when i was in high school some of the pranks were taking all the clocks in the school pulling all the desk into one hallway so no one can get to class putting a old car on top of the school roof i forgot what was put on doorknobs
Well all of you seniors could have a food fight at a certain time letting all people but authority know.Or like my school senior class did. We had a water balloon (guns etc.) fight including the whole school, During the last 15 minutes of the year it was fun and hilarious. They can't do anything about it because school is over. All the teachers including the principal were soaked.
One of the best senior pranks I ever heard about happened at graduation, where the first person to shake the hands of the graduates was passed a marble from each person greeted.
There is no such thing as a "great" prank when someone is hurt or embarrassed or if something becomes damaged. Believe me, you can graduate without doing anything mischievous!
If it is just you change your name the last day and raise your hand. So when the teacher says yes Mary .... so no I am Kim and go on as nothing. Have the other classmates call you Kim also. Have the teacher going in circles a few hours
The best prank would be to put saran wrap over the toilet bowl. Males? Don't forget to put the seat back down.
We went around the evening before collecting as many house for sale signs as possible, then attached them to the school fences.... it was very funny. I'm pretty sure it isn't illegal, well we didn't get in any trouble, but it was a last minute plan. I can imagine real estates giving you there signs for free if you asked, after all.... There is no such thing as bad publicity.
Burn the school down. There not vandalism just arson. Just kidding
Set up B-B que in the junior parking lot early in the morning.. have a party.. As sophomores and Juniors come in to park... send them away... P.s.. block the entrance with senior cars.. Haven't you gotten outta school already???