Here are ten clever sucker bets from Richard Wiseman. They're a good mix of physics, logic, low trickery, concept-shifting, misdirection, topology, and breathtaking chutzpah. Seriously, I can't believe that he ever tried #10, because he is still breathing.
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.