I was backing into my garage in reverse gear when there was a sudden power surge and the car accelerated rapidly backwards (without me pushing the gas pedal), which led to a crash that caused substantial damage to the car. The car was out of my control, with it accelerating without reason, so something failed on the car. I do not know what component failed, only that there was a sudden and rapid acceleration in reverse. There are no warning lights and the car was taken for an estimate and damages exceed $10,000.