2011 Ford F-150 cruise control problems

Tl* the contact owns a 2011 ford f-150. The contact stated that while his wife was driving out of a parking lot at 5 MPH, the vehicle experienced unintended acceleration. No warning lights illuminated. As a result, the vehicle crashed into a parked vehicle, another vehicle that was exiting the parking lot and two pedestrians. Both pedestrians were injured and required medical attention. The contact stated that one of the pedestrian had to have surgery. The driver did not sustained injuries.

Driving on highway at 70MPH, I saw my speedometer momentarily drop to 40MPH. It did it again about 15 seconds later, and downshifted to about 4th gear momentarily. About a minute later, still at 70MPH the speedometer dropped, and the transmission downshifted to 1st gear! My rear wheels locked up, and I lost control, and fishtailed for a few seconds. Luckily I had taken a half day vacation and was not in rush hour traffic. Still other cars had to swerve to keep from being hit.