Billy, an intern at Instructables, made this gigantic match out of 15,000 match-heads, 30 ping pong balls, and a 96-inch long piece of 4x4 lumber. The ignition sequence -- lovingly documented in a series of videos on the Instructables page -- is a joyous conflagration. Link
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.