Had a big crash today with my quad from about 25-30m up. Interesting as I was in alt hold when it started to go a bit wobbly and rotate. The she dropped. Was filimg with GoPro at the time and actaully caught footage of what might of happened. Attached you can see a picture of the motor, half a blade and the arm where it was broken off. You would not believe me if I told you this happened mid flight!! See the other photo attached a bit blury as it came from the video. You see the exact same part flying thru the air. Now, did the blade snap first or did the aluminium arm snap first. Regardless, I am quite amazed that the aluminium arm would snap off mid flight. The logs show the motor #1 spinning up quite drastically and then down she came.