I BACKED DOWN THE DRIVEWAY. THERE WAS A TRASH CAN IN THE WAY AT THE BOTTOM OF THE DRIVEWAY, SO I PUT THE CAR IN PARK AND HOPPED OUT TO MOVE THE CAN. I TURNED TO GET BACK IN THE CAR AND FOUND IT MOVING FORWARD UP THE DRIVEWAY. I CHASED THE CAR UP THE DRIVEWAY. IT RAN OVER A JOGGERBUGGY AND STRUCK A RETAINING WALL BEFORE I WAS ABLE TO GET INTO IT AND STOP IT.