Snapped this weekend at a movie theater in London: an automated ticket machine (confusingly abbreviated to "ATM" -- namespace collision ahoy!) with a sign on it explaining that if you don't want to cancel your transaction, you should press "cancel," while if you want to cancel your transaction, by all means, press "retry."
I write books. My latest is a YA science fiction novel called Homeland (it's the sequel to Little Brother). More books: Rapture of the Nerds (a novel, with Charlie Stross); With a Little Help (short stories); and The Great Big Beautiful Tomorrow (novella and nonfic). I speak all over the place and I tweet and tumble, too.