Ky Richardson is like the Ed "Big Daddy" Roth of rocketry. He has built more rocket-powered vehicles and set more rocket-powered records than anyone else on Earth. Besides rockets and rocketbelts, he's made rocket-powered bicycles, rocket-powered wheelchairs, rocket-powered scooters, and of course, rocket-powered chairs (as seen below).
Check out his stammering works of functional art at his less-than-stammeringly-well-designed website.
Also, be sure to check out "the most comprehensive website on Rocketbelts and Jetpacks" Flying Into The Future where it is said "If Your [sic] Not Living On The Edge, Your [sic] Taking Up To [sic] Much Space." Sounds like something Hatchet would say.