[Robotbeat]

As far as I can tell, they're working on a garage budget. A ten meter tower and crane is non-trivial to rent and setup.

No reason to disprove something that is disprovable with a basic understanding of basic physics and aerodynamics.

I expect the big challenge with a device like this is NOT ascending too high where you'd be at risk of breaking a leg or thousands of dollars worth of red-hot jet turbine. This isn't a drone, it's a flying person.