2005 Toyota Camry cruise control problems

My father was driving a 2006 camry. He was backing into a parking spot at a supermarket shopping center in palisades park, nj. He decided to go forward and then back up again. When he attempted to go forward slowly and briefly, the accelerator opened full-throttle. He attempted to brake as hard as he could but the car kept accelerating. He hit two people while trying to bring the car under control and then slammed into a long row of shopping carts. The car shut off once it collided with the carts.

Having returned home in the early evening, my mother was backing her 2005 toyota camry into her driveway (this was a normal routine as this is how she parks her car). Her driveway is flat and straight and she lives alone so no other cars were in the driveway. Shortly after her car began moving in reverse, her car suddenly, unexpectedly accelerated and swerved out of control.