In this video, astronaut Don Pettit demonstrates yo-yo tricks in space. Yes, he's on the International Space Station making time to vlog about yo-yos and science. Pettit: "Because I'm in space, and I can, I get to name these yo-yo tricks as I invent them. I call this one 'Shoot the Planets!'" He also offers relationship advice for yo-yo/physics loving folks. More like this, please.