This is not my video. I had a slight mishap the other day. I sometimes use a piece of cardboard to launch from the grass. I forgot to take the gimbal lock off so I landed immediately. The X-Star landed with the back off the cardboard, so it tipped backwards. I pulled the sticks back and thought I had killed the motors because the back ones stopped. As I approached I realized that the front ones were still spinning, at idle, so they were pretty quiet. I set it level and the front motors stayed on, but the back ones had turned off. I assume that the problem was detected and the rear ones were turned off.