If this guy is retiring from the Space Program he could always take up music. This is Commander Chris Hadfield's goodbye to the International Space Station, after a 6 month stay. He and two fellow astronauts return to earth on May 14th. He has posted many videos show the ISS astronauts going about everyday tasks in zero-gravity, but this is a little different. Yes, that is Commander Hadfield singing! Pretty good, huh?