Don't ask me why - I just thought it was funny.
Heisenberg gets pulled over by the cops for speeding. Cop walks up to his care and asks,"sir, do you have any idea how fast you were going?"
Heisenberg replies, "no, but I know exactly where I am."
Update: if you haven't managed to get your geek on, click here (hey - a couple of people asked, and I'm nothing if not accommodating).