I knew there was a bad side to the good thing! Bah!
They're really selling a product when they say that!
OT: They look really nifty. In the video the guy looked like he had complete control of it and it was very stable/safe. It would definitely be a great time. If you bought one, and had people pay $50 or so odd dollars to use it for 30 minutes or so, you could make all your money back + fuel and keep the jet pack xD
Red
$50 for 30 mins? more like $100 for 15 mins, and they would probably have an alarm sound come on when getting low on fuel that wouldnt turn off unless refueled.
@JDB - I doubt a backpack size jetpack will ever come out thats more stable than that, size would have a great deal to do with stability.