Boredom?
I saw the indoor vid - with an even more intensive hornet sound.
I see no GPS module - can you make it hover in PH in front of a big bloom? That'll make a nice picture.
If you paint the hood in yellow & black you certainly could freak out some neighbours with your monster hornet!
Yah ... and how the heck do you control the motors? Did you use the ones from the LB boards?