senior pranks, any good ones? Options

[misoshiru]

so what pranks have your previous seniors pulled? our school has had some really lame ones...for example, last year, the seniors broke the dress code as their senior prank . but i've heard and thought of some pretty awesome ones:

- at my friend's old school, once the seniors set loose 3 pigs in the school and had numbered on the pigs 1, 2, and 4. as a result, the school faculty spent days looking for pig #3...which conveniently did not exist.

- seniors saran-wrapping the toilet seats.

- pulling off a fire alarm every period of the day (i think i read this somewhere)

- setting loose a whole flock of chickens in school, while playing "old macdonald had a farm" on repeat over the PA system...except changing the lyrics to having to do with chickens.

[Fabio.]

some my school has done, some my dad did when he was a troublemaker in school...

+ painting all of the speed bumps hot pink
+ my dad's principal had a VW bug (which only has four bolts holding the motor in), and they loosened the four bolts so that when he started the car, the engine fell out
+ if your school has ramps, riding a motorcycle through it
+ back when superglue still held anything together, my dad superglued all of the desks and chairs in a big pile to the floor. Six years later when my mom came through the same high school, the room was still shut down
+ bleaching "penis" into the football field before homecoming game
+ having this hugely disasterous food fight
+ and when they called the cops in en masse the next year, the senior prank was there WAS no food fight

my favorite:

+ during the graduation ceremony, every senior had a marble in his or her hand. Then when they shook the principal's hand, they'd give him the marble. There's about five hundred in the graduating class and he had to play it cool...