Does it worry anyone that he looses this thing in the clouds on a regular basis? Seems irresponsible to fly it on a day where you can't keep it in view. With this much speed it's basically a flying remote controlled rocket/projectile that would kill someone instantly if it hit them.

I wonder how this thing handles loosing contact with the controller?

It's no wonder the FCC in US is getting less and less RC friendly, besides the typical "home land security" drama stuff like this in a public park could be a real problem from noise pollution to safety of other people in the area.

All this said, must be quite a rush to play with something like that, I would love to fly it in an open field deep in the desert with a clear open sky.