Luckily, I was parked when this occurred. It happened twice, both times was in Park. I mentioned it to the dealer, he said there had been a couple of complaints about it happening with other customers and dropped it. I'm glad I wasn't in traffic when they happened. It was scary. Was parked and before I turned the key off, the accelarator increased a lot on it's own. I shut the car off. The same thing happened a few weeks later. Same circumstances.