I swore in front of the public for the first time today. My truck was parked on the street across the street from the driveway of the house next to the one to which I was delivering (was safest spot). As I'm walking up the short driveway for the delivery, a guy gets out of his car in the next driveway over and asks me if the package is for him. I told him it was for his neighbor at which time we both see his car rolling backwards down the driveway picking up speed heading straight at...you guessed it...my truck. "OH S***" I blurted as he ran alongside it trying to get into the car. Right at the base of the driveway he managed to get in and hit the brakes...Rear bumper came about 6 feet from T-boning my parked truck. I see a few new gray hairs popping up.