Twice my car unexpectedly accelerated. the first time, my car was in reverse, and my foot was on the brake. the engine suddenly revved. i put the car in park and turned it off. the second time, i was in drive with my foot on the brake. the engine suddenly revved. i put the car in park and turned it off. neither time did my car move. i took the car to the dealership. they found nothing wrong. because i no longer felt safe, i sold the car back to the dealership. the car had approximately 2,200 miles on it. the car cost about $18,000. the dealer bought it back for $12,000.