A fight between two cosplayers dressed as giant Tetris bricks broke out last week at VIANCO, an anime convention held in Tijuana. Don't know if this is a put-on or a genuine brawl -- and I don't care. I just enjoy watching geometric shapes in berzerker rage. Video link 1, Video link 2 (Thanks, Noruru!)
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.