Okay, so it only works when your over water, but this is a jet pack nonetheless!
It seems like it works though a huge fire hose, and a jet ski type craft pulling along with you. Yes at first I thought, this isn't a real jet pack! You still have to be connected to something to fly the thing.
Then I watched the video, and now I see some potential as a really fun water sport. Have a look.
The JetLev Flyer are for sale but you have to be on a waitinglist.