Well we (the school, since im only a junior, two more days!) had a couple of good senior pranks this year. They spelled SENIORS 07 in the grass in front of our "tower" with plastic forks. They put a trip wire in the bottom floor of the main building (not the best idea). One kid brought his sheep to school. They set off their car alarms. A whole bunch of them brought scooters to school.
Some of the best pranks happened a couple years ago. They planted a tree upside-down in the baseball field. They did the pig thing with chickens. Last year, the seniors blew up condoms and let em float to the cafeteria ceiling (unfortuantely i never saw it...and since youre probably wondering, i go to an all guys school, explains a lot, doesnt it?). Oh yea, and we always have a slip n' slide.
Just some of the good pranks from the seniots at my school.
Matt