Impressive that they have managed to improve the power to weight ratio of a form of jet pack and interesting that they have returned to the low centre of gravity that the old paraffin flying dustbins had. I notice that a disadvantage of this strategy is take off and landing stability. The flying dustbin had rigidity and a pilot standing inside. This "surf board" is much lighter and more maneuverable by the look of it. Back mounted packs are probably more stable but less maneuverable and there are the issues of heat deflection and where to put the fuel.
One of "my" deputy sheriffs had something similar. Driving down the freeway one afternoon, a bank robbery was broadcast. When the description and direction of travel were given, my guy picked up the mic and announced, "2D4 . . . I'm right behind him." There was an immediate gasp from all the supervisory staff on the radio . . . Oh, God! Not HIM!
He was widely thought of as being a cowboy, but a damned fine cowboy!
He lit up his reds and blues and got after the suspect who, felt he had to get the cop off his back, so began tossing bundles of banknotes out of the car. That did tend to stop a lot of vehicle traffic, but not our man. He simply unracked his shotgun, laid it over the spotlight, and began firing.
Knowing the gig was up, he pulled over and surrendered. Car towed, suspect jailed, deputy got cracking on the paperwork, including 'property in custody' reports for the currency recovered in the vehicle and by a number of honest citizens. Dumped the paper parcel in the sergeant's IN basket and went out to fuel up his car and go home. (This was authorized as he also was a SWAT team member.) Stopped short at the sight of a single banknote hanging onto the grill or his car, back inside for another PIC form, then home at last.
I truly shocked a captain once by suggesting the man ought to be sent to the state police training academy as an instructor. I imagine he must have had nightmares for over a week thinking about that.