I'm a long time UAV enthusiast, but only little manually flown devices. I've been seriously considering moving up to the Phantom 2 in the next few months. One thing that keeps giving me hesitation is the fear of the much debated "flyaway." That's actually secondary to my concern about whether it's going to take out some kid when it finally decides to crash. So on this topic of helping "stop" a flyaway in its tracks (if you react fast enough), I had a thought. Forgive me if it's dumb or has already been discussed. Several manufacturers are now selling parachute recovery systems for quadcopters that can be remotely activated through an attached servo. Being somewhat of a hobby electrician most of my life, I thought it would be pretty easy to wire a relay to that parachute servo that would then run to a separate switch that would immediately kill the battery supply to the rotors. How it would work: Quad pilot notices a flyaway may be unfolding, or they've otherwise lost control of their unit. If they can react fast enough, they hit the parachute switch which deploys the parachute while at the same time cutting off the battery. Brick floats safely to ground. Theoretically. On one hand this kind of feature shouldn't be necessary as you're supposed to be able to brick the Phantom remotely, but some of the flyaway reports I've read have reported this may not work with all situations. Anyway, that was my late night thought. Feel free to tell me it's the stupidest idea in the world, or that 20 other people have already thought about it and are marketing it.