Is this even possible? I'm a bit too chicken to try, but what happens if you push the left stick to the bottom right, and the right stick to the bottom left while it's at altitude? As I'm holding it and trying it, it does completely shut down the motors. The reason I ask is that about a week ago, I was up at around 1000' feet when all of a sudden the thing fell like a rock - like someone had taken the battery out. It suffered no damage (landed in a lake, and after disassembling and drying it, it was fine). I found one small brass spacer (from one of the motor shafts) stuck under one of the ESC - and figured that must have shorted out the system. Even without the retaining clip or spacer, the motor held together by magnetic force, and still flew fine (I replaced the motor since). But now I'm wondering if I didn't inadvertently turn off the power as I was trying to get the unit to come back. If during a fast descent, you try to turn the unit to the right, while pitching and rolling to the left, I could see how the input on both sticks could trigger a shutdown.