Thx Lauren(FrostBite19) for the idea!

Difficulty:
★☆☆☆☆

At the end of class, when NOBODY IS LOOKING, put your backpack on another person's desk or chair. When they look at you, say, "Hey, you took my backpack!"

Every person's reaction is different, so don't always expect them to have the reaction you want them to.

Tips:
• As always, make sure NO ONE IS LOOKING.
• There really isn't much tips for this one.