Ever wonder what it would be like on board the Starship Enterprise when Capt. Kirk commands Mr. Sulu to fire the thrusters, only to have the artificial gravity turn off at the same time? We’ve got our own 21st century equivalent of a big spaceship — the International Space Station — firing its thrusters in order to stay in a good orbit around Earth. And since we haven’t invented artificial gravity yet, you can see what happens. In the video are Expedition 29 Commander Mike Fossum and Flight Engineers Satoshi Furukawa and Sergei Volkov, demonstrating what it is like to experience the acceleration from firing the thrusters.