That's an old video mang.
Check out this Australian design:
http://www.hover-bike.com/faq.html
Airspeed Vne - 150 KIAS (untested)
Hover (out of ground effect) - >10,000ft (estimated)
Dry weight - 110kg
Max gross weight - 270kg
Total thrust - 295kg
Engine - 80kw @ 7500rpm
Can't see too many downsides... just wear a BASE parachute and strap some pillows on while flying the prototypes