Had a mathematician come and speak to us in high school. He demonstrated the birthday paradox by finding two people in my year with the same birthday. It turned out to be me, and arguably the most vicious bully in the school.
Mine says "Cornelia Hale, W.I.T.C.H.", whoever that is, but I do happen to know that I also share a birthday (May 10) with John Constantine, so that's cool...