I had a crash on Thursday from 60 feet. I saw a propeller go flying off, then watched with a sickening feeling as the Phantom headed to the ground. When I did a post-mortem on it, I found that the center yellow wire had detached from the clockwise motor's ESC. I didn't make a mental note of which motor was missing the prop, so I'm not sure if that was the one. I don't know if the wire came off in flight, or as a result of the impact. My guess would be the impact, as I don't think the prop would fly off if the wire detached in flight. The centrifugal force would keep it spinning clockwise. But, I've been wrong many times before. Is it possible that the wire detached and somehow the prop then flew off?