Smile...this is funny stuff damn it

Ways to annoy a professor:
Bring a small cactus to class with you. Raise your hand, and when you're called on, say that the cactus has a question. Turn and look at the cactus, as if you're waiting for it to say something. After a few moments, shrug, and wait for your professor to move on. Do this once a day, and become increasingly irritated with the cactus every time, sighing heavily and giving it evil looks when it fails to "speak." When you leave the room after class, start yelling at the cactus, "I can't believe you embarrassed me AGAIN...."

Show up to class about ten minutes late. Ride into the room on a bicycle, yell, "Look out!" and crash into the blackboard. Get up, take a seat, and act like nothing happened. Do this every day.

While he/she is lecturing, shout out things like, "What!?" and "Speak up! You're mumbling!" If your professor advises you to sit closer to the front, tell him/her you can't because you're scouting the room for "assassins."

Instead of taking notes, do an abstract painting during every class. Call the paintings things like, "Professor Acting Like Mr. Know-It-All" or "Idiot Who Doesn't Know What The Hell He's Talking About." Give the paintings to your professor as gifts.