I'm planning a trip to Cambridge early next month. I plan on sneaking in to one of Professor Sussman's into to CS lectures and heckling him. Just the standard treatment: interruption with stupid questions, correcting irrelevant things, demanding clarification on stuff, stating that he's wrong with an air of arrogance, etc....
Put your phone in a bag and have it start playing the `We conjure the spirits of the computer with our spells' electronic chant thing halfway through the lecture, then make a big deal about it when it annoys him enough to tell you to turn it off.