I have not flown my H much at all lately. Very busy this year getting settled into retirement. I took my H up the other day and it all went bad. I let it sit for several minutes,all seemed good except my sattelite acquisition was not the best. kept bouncing around between 12 and 14 on both trans. and drone. It stabilized finally and I took off. I was in my backyard in a small opening say 100 feet. I raised landing gear at about 10 feet and drone started to drift. I keptbringing it back. Still more erratic movements and slow response. Highest I went was about 30 feet,angle mode of course. I decided to land before something happened. I lowered the landing gear and thought I wouls still try to hit my 2foot square landing pad. H was still very confused. Brought it down and missed the pad. The H was now very erratic .I set it down on some slightly uneven ground and it tipped,completely over. I received 5 rotor motor error and it finally responded tothe red button. All happened in the blink of an eye. Not even a broken prop.Cleaned drone and props up and benched it. Here is what happened. Yesterday I was looking over the area where I flew. There was my sensor for a driveway alarm pointing right at me. I use it as a deer alarm for the garden. Then there was the motion detector for the night lights,just a few feet away.After reading all your thoughts and input on this thread I also realized my landing was in turtle mode. All the above were operator error. I believe these sensors interfere with our signals. For those of you having problems at sites in the field, how many times is it possible you could have ran into a customer with sensors allover the place. When nothing else mkes any sense,we must consider these as some kind of interference.After I remove these I am going to try again,,maybe in another day or 2. Keith C.