Tesla full self driving drove off highway curb and dropped 10 feet down, vehicle was total loss, airbags popped. There was a car trying to change to Tesla lane, Tesla overacted and took over control, and driver was unable to take back the control while in full self driving mode, no warning sign whatsoever during the accident, Tesla just drove off high way curb by itself. No collision between Tesla and other car. As experienced driver for over 30 years, I have never had accidents at fault, never made such silly mistake to drive off high way.