Something mentioned casually on Facebook sent me looking, and finding this:
That is a Zapata Racing Flyboard Air, which uses kerosene to run some turboprops that allow madmen to surfboard through the air like Iron Man. There was some stuff noised about last year about a US defense contractor purchasing the French company that makes these things, but that deal has apparently fallen through. Still: assuming that the designers can make these things something else besides an admittedly awesome toy, you can see why the military would be interested in Flyboards.