I met Steve Wozniak at a talk he gave. I asked him what he thought about the Singularity (which is when the machines take over the world, very roughly speaking), and he talked with me about it for a minute. He was really cool! He even gave me his business card, which is made of titanium and can cut steak (seriously!).
I asked him to sign my copy of his book iWoz, and he inscribed it for me:
Christian, When the computers takeoffover, you will be missed.
-- Woz