One day she handed out a bunch of plastic squirrels to teach us (a group of legal aged adults, mind you) about the use of prepositions. This should have been a one day task, but this monster somehow filled up an entire week with this bullshit. After leaving class my best friend told me he grabbed 2 out of 6 little plastic squirrels. After school, we went home and (to make a long story short) we covered them in lighter fluid, set them on fire until they were burned beyond recognition, put what was left in a condom, and returned them to her desk.
Was it nice? No. Was I the one that decided to take 2 little plastic squirrels hostage? No. Do I still get a giggle when I think about it? Of course!

What are some pranks you played on the teachers you didn't like?