with lots of new snow, I decided to test recovery time needed to stop the fall if motors stopped during the flight.
I did it the way I see this accident to happend. - while in loiter, I took the throttle stick all the way down, for descend - then - switched to stabilize.
Motors stopped, I pushed the throttle up, - apparently 8 meters was not enought to stabilize, and it hit some bushes. The test was a success.
What to learn from this ? - it should be impossible to stop motors in flight ? -a minimum RPM should be maintained from the point of arming, to disarming ?