Sir Isaac Newton once said....well in this instance he would have thought differently.
It was my sisters 25th birthday last month and wanted to do something fun with her, I thought tea and cake would just not cut it, so in the end surprised her with.... I suppose you could call it body flying, let me explain. You take a wind tunnel for testing the aerodynamics of a formula 1 race car flip it 90 degrees, put on a jump suit and voila!
Chellie was a natural at it, the rest of us were bouncing around all over the place while she just smiled and waved :)