I WAS MAKING A SHARP RIGHT TURN TO PULL INTO A PARKING SPACE, SLOWING TO A STOP. THE CAR SUDDENLY AND UNEXPECTEDLY ACCELERATED FORWARD OUT OF MY CONTROL. I APPLIED THE BRAKES AS HARD AS I COULD, WITH NO RESPONSE. AS THE CAR WAS RACING INTO A TREE, I SHUT OFF THE ENGINE BY PUSHING THE POWER BUTTON TO OFF. THE CAR KNOCKED DOWN A TREE AND CAME TO A STOP ON TOP OF IT.