Wired recently had an article on this Swiss pilot who has spend the last few years developing some rocket wings that he straps to his back. Basically he jumps out of a plane, unfolds the wings and powers up the rockets. He is able to steer pretty well (enough to do barrel rolls), build up some good speeds (over 300kph) and crucially land safely.

Very cool, but I’m sure it’s not as safe as he makes out.