Here is a video of Professor Stephen Hawking taking the zero-g flight.

"ZERO-G(TM) and its sponsors, Space Florida and The Sharper Image, flew world-renowned physicist and cosmologist Professor Stephen Hawking into weightlessness today, performing eight parabolas, out of the Shuttle Landing Facility at the Kennedy Space Center in Central Florida. It was the first time Professor Hawking, the world's leading expert on gravity, had a zero-gravity experience."