So I landed my mavic on top of a structure that I could not access by foot (dumb idea #1). The prop was up against a rod, obstructing my ability to take off. My plan (dumb idea #2)... since I had no way to access my drone and I did not want to just leave it... I decided to buy a second mavic to retrieve the first... yeah, I know, bu bear with me. So I made a 3 foot wire hook and flew up and caught hold of the mavic well and was flying it toward me. It was going ok, but it was going slow and I dropped it a couple times during the attempt and had to pick it back up a few times. I received a warning of "Battery: Over current during discharge," but otherwise, no issues. I was getting low on battery, so aborted the attempt and began to descend at about 16% battery from 60 feet. I was descending straight down and halfway, the drone seemed to become unresponsive and flew straight into the concrete and hit very very hard. I reviewed the flight log and the battery rapidly discharged from 16% during descent. It reported that it was auto landing, but that was the only error message. I had reversed the throttle prior to crash, but no response. The battery read 4% after the crash. I've flown DJI for years and have done various dumb things like this, but have never had a DJI crash while landing like this. Any thoughts?