Indeed, I did go to the link. At Fly-Away I donned a loose fitting "jump suit" which had sleeves and pantlegs that filled with air.
Arch your back, push down with your arms and legs, and up you go! There were staff members playing around in the chamber when we showed up... some of them were awesome, performing flips and spins, etc. There was also a guy in a "control room" that varied the speed of the fan for you. If he saw you coming down, he'd turn it up, and vice versa. For the staff members, it was on haul butt the whole time.
Duane