Harry Potter Fans.... Lets just say your out to eat and your waiter is Lord Voldemort... what do you do?

I would conveniently "forget" to ask for no mayo on my sandwich, and then as soon as I get my order I will say I ordered it with mayo. If he pulls the "don't lie to Lord Voldemort" card, I would complain to the manager. I will leave a dollar as a tip.