We all know that the moon has 1/6th of the Earth's gravity.

However, a falling object will take 2.5 times longer to hit the surface when dropped on the moon rather than the Earth.

(do some searches to see why)
However, some assume that a jumping astronaut will also take 2.5 times longer to return to the surface. In fact, the Apollo Lunar landings have a video to even prove this.
Here is the youtube video
http://youtube.com/watch?v=G29WT2_y1-E&feature=related
I was not convinced. Having written a solar system simulator earlier this year (2008)
http://www.software-multimedia.com/S...0simulator.htm
So I write another little computer program to test it.
http://www.poseidons.net/space/moonwalker.htm
Download the 120kb program to see what you think.