I was flying my P2V+ V3 at about 70' I went to descend and pulled the left stick all the way down while the right stick was centered. I'm not sure of the precise timing, but it seemed to me the motors stopped very soon after the left stick hit the detent position. A gimbal damaging crash occurred. I had recently switched the flight controller to NAZA mode. After the crash I connected to verify Intelligent Motor Cutoff was selected, it was. All 4 motors also fired up. I may have been near the edge of a NFZ. But the bird took off normally and I flew less than 200' from the home point. My understanding if I flew into a NFZ it should self land, not cut off the motors in mid air. Any thoughts on what may have happened? I'm now in the unhappy decision making process of having the gimbal repaired, replaced or bite the bullet and go to P3. I don't think I want to even consider a new gimbal unless I can figure out what caused the bird to fall.