Jet-Vac for instance was initially called Air-Hawk and had lights in his vacuum pack and was a whole range of colors before the design settled on the metallic blue look he has today.
"It's a bonding experience, one that very few people in the world have ever had, " said trainer Dean O'Malley, adding that first-time users typically managed to reach heights of 10 to 15 feet with the jet pack.