In his down time, NASA astronaut Don Pettit likes to practice his yo-yo skills. In space. Commencing child-like wonderment in 3... 2... 1...

He also dispenses some pretty excellent dating advice re: physics and yo-yos. All-in-all, even more evidence that Pettit is one of the coolest astronauts to ever orbit Earth aboard the ISS.

Via Physics Central's always awesome Physics Off the Sphere series.