Ok was at the farm thought I would get a flight and video going down up drive to house. I have large metal gate way arch,and trees lining roadway both sides. I drive 18 wheelers loaded with hay thru this thing at 40 mph yet I hit it with drone at 2 mph....lol..once drone made contact I pulled left stick all the way back, drone fell about 10 feet to gravel roadway, props got lots of paint from arch on them but everything seemed ok, restarted flew another 20 minutes. Looking back should have just reversed drone and it might have suffered the prop hitting metal but may not have fallen, lessons learned. judge height better and think before hand what to do if you get a prop strike.