Today I was flying the Karma in a wooded area with a giant abandoned bridge that goes over a river and valley. After about 7 minutes of flying with complete control and GPS signal to a distance of about 300 ft away, I came back to land on the paved road beneath the bridge. With about 2 feet left until touchdown while I was about 20 feet away, the Karma took complete control of itself, as if it had its own mind, and flew straight up into the bottom of the concrete bridge which is about 80 feet high and the slammed to the pavement below, utterly destroying the drone and Hero5 which was attached. GoPro say that it is not their problem. Very disappointed with them. Glad I sold my shares of the company. NOT HAPPY.