I gave a friend a ride to Wal mart in my 2001 Expedition to buy some power steering fluid, luckily I parked over by the automotive section. I turned it off and waited in vehicle till he returned, about 7 or 8 minutes. I started the engine, grabbed the brake and dropped it in reverse when engine revved sending us backwards completely out of control with both feet on the brakes, spinning rear wheels and I turned ignition key off as quick as possible but violently slammed into a truck semitrailer only, parked alongside Wal mart tire shop. Completely totalled out the entire rear passenger liftback, taillights, tailgate, rear hatch window, left rear luever window, left tailpipe, tow hitch package and rear bumper. With only min. coverage, I'm now w/o a vehicle after completely replacing entire front and rear suspension, steering and tires plus alignment less than 6 months prior, with 275000 miles. Thank you very much Ford Motor Co. This was NOT an issue of driver error !.. I WILL find a way to legally hold you responsible for my loss, making FORD liable for repairing or replacing my vehicle ! This happened on Aug 29th, 2022 approx. 4pm at Wal mart property, in Ukiah, CA. 95482