Kia's ad agency made this clever (and time-consuming) stop-motion animation using 900 cels painted onto artificial fingernails and then captured on a model's hand. The animation is very fun, especially if you turn off the sound and avoid the awful accompanying music.
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.