WE WERE BACKING DOWN OUR DRIVEWAY IN OUR 2009 TOYOTA PRIUS. AS WE APPROACHED THE STREET OUR CAR SUDDENLY MADE A LOUD WHINING NOISE AND STARTED ACCELERATING BACKWARDS. BEFORE WE COULD DO ANYTHING, WE BACKED INTO THE CAR PARKED ACROSS FROM OUR DRIVEWAY. AFTER WE COLLECTED OURSELVES, WE DECIDED TO MOVE THE CAR OUT OF THE STREET INTO OUR DRIVEWAY. THE SUDDEN ACCELERATION HAPPENED AGAIN, BUT THIS TIME MY HUSBAND REACHED OVER AND HIT THE PARK BUTTON AND WE STOPPED BEFORE WE HIT ANYTHING. I HAVE DRIVEN OUR OTHER TWO CARS DOWN OUR LONG DRIVEWAY SINCE, AND WE ONLY USE THE ACCELERATOR TO START THE CAR MOVING. AFTER THAT, WE ARE BRAKING ALL THE WAY DOWN THE DRIVE. THE ACCELERATION OCCURRED NEAR THE STREET WHERE WE PAUSE TO CHECK ON THE TRAFFIC. NOW THAT I HAVE CHECKED MYSELF WITH OUR OTHER CARS, I AM SURE I DID NOT HAVE MY FOOT ON THE ACCELERATOR PEDAL AT THE BOTTOM OF THE DRIVE, AS I BRAKE ALL THE WAY DOWN. OUR PRIUS IS OVER AT THE DEALER, AND WE HAVE FILED A COMPLAINT WITH TOYOTA. WE ARE AFRAID OF THE CAR. WE DID HAVE THE CAR FIXED AT THE RECALL. *TR