These videos are just too cool. An English company called Gravity Industries build and markets what they call jet suits, and man -- aside from any practical uses they may have -- do they look fun.
Immediately below is a video of a guy being trained to use one of the suits. I don't know, but it all looks dangerous to me. The intersection of a bug and a car's windshield come to mind. With that thought in mind, the last video is from the 1991 film The Rocketeer.