I had NO IDEA that electric RC helicopters had evolved this much - cuban 8's, immelmans, aileron rolls - and stuff that has no name. It's insane. I'm fascinated watching these clips. You always hear on the news that another military helicopter has crashed - they are probably the most fatal military vehicle. Imagine what happens when we strap a video camera and some missiles onto one of these. Watch the clip and you'll see how frightening that could be. A Trex 600 will go for $1200. Cheaper 3D-capable model helis look to be about $300.