Party Tricks

Everyone needs a party trick or two. You know, when you want to draw attention to yourself, or you need to do something to un-bore everything. Easy example: magic tricks. My father likes hanging a spoonfrom his nose (apparently this is hard for people who haven't broken their noses).
What do I do? I've got a few - but I always like to whip out old student IDs from when I had a different haircut. Also fun: I can hack into a Mac in less than five minutes* (and no, no damage is done, and I don't take it apart).
*Before you say that this is a massive security problem, it isn't (I'll spare you the whole discussion, but trust me, I'm an expert).