You've seen the Martin jetpack in action. Now see levitation flight which uses water as its jet propulsion medium.
JetLev's device has a fly-by-wire digital throttle control. The website says that the nozzle's angles determine allocation of thrust between lift and propulsion (forward, neutral or reverse); differential nozzle deflection generates yaw moments; and weight shifting from side-to-side generates roll moments.
The site has more information on the device's technology and where you thrillseekers can get hold of one.