That's pretty cool! I need one of these with a camera and a .338 Lapua mounted on it.
Screw the Lapua. I'd be scared of a swarm of those things comming down off a wall with some sorta super sharp rotor blades and just cutting clean through you.
That reminded me a lot of a hummingbird the way it moved, pretty amazing technology.
My vote is the zombies will get us first...
My jaw just dropped. Literally.