It started out as just a simple fender-bender but a couple of hours later the driver, Chinnamma Sebastian, 49, Philadelphia, PA, wound up in a hospital in critical condition with multiple injuries. Sebastian stood in a grassy area near the location of the minor accident and watched as her car was hooked to the flatbed of a tow truck, when suddenly the 1988 Mercedes went into reverse and rolled off. The car ran over her and hit the tow truck driver, who suffered minor injuries. It finally stopped when it hit another tow truck.