An anti-landmine activist/traceur (one who practices parkour) working with the Dangerous Ground Project tried to cross all 50,000 square metres of central London without touching the ground. The resulting video is part parkour excitement, part chilling reminder of the risks that people all over the world face from the landmines that surround their homes, schools and places of work. 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.