Ahh, the high school days.
I was the quiet one--the sweet little innocent girl that no one would ever suspect anything bad from. I pulled so many horrible tricks.
The classic pencil-in-the-ceiling: There's a technique to use to get the pencils to really stick. Lay the pencil flat on your palm and launch it upwards.
Gross stuff in the coin returns: Squirting some mustard, ketchup, etc. in the coin return (or where the bottles/snacks come out) of a vending machine really pisses people off.
The driver's ed. books: It started with a few little penises on the bottom of some pages that someone drew prior to me--my friend and I transformed the driver's ed. books into a mess of offensive doodles. The teacher was oblivious.
Old food: Slip some food into an empty locker (or a place someone will rarely check), wait a week, and smell the glory.
The spitballs: (Rob and I did this one together.) I admit, I got caught with this one. It started with little spitballs, then we got innovative. Rob used chocolate milk to make disgusting brown spitballs and I shoved entire napkins in my mouth to create monster-sized wads. By the end of lunch, the door was covered. I got caught throwing a massive spitball and we ended up having to clean the door, hilariously.
Tampon in the water fountain: This is my absolute favorite. Coloring the tip of a tampon with a red marker looks surprisingly realistic. It needs to be colored dark, to get that deep, red, menstrual blood color. Slip it in the water fountain and watch the janitors come by with a bucket, gloves, and tons of cleaners. I laughed endlessly.
I also had fart bombs I never used. Alas. Hopefully I've given all of you ideas to get in trouble with.