I crashed today from two or three feet altitude (long, sad story). I stopped the motors as fast as I could but it took 4-5 seconds. Three of the props had pieces broken off them. Since most, if not all, of the props were stuck against the ground or in branches and not spinning, can this damage the motors or is there some kind of failsafe mode where power to the motors shut off if there is too much load? After checking everything out I flew it again and it seems to be fine. I'm just wondering what happens to the motors if the aircraft is running with power but the props can't move.