A woman whose Ford Explorer flipped the same day she bought it filed a negligence suit Tuesday against Bridgestone/Firestone, Ford and the auto dealer who sold her the vehicle, according to the Tampa law firm of James, Hoyer, Newcomer & Smiljanich, P.A. Virginia Gray, 24, filed the lawsuit in federal court in Tampa. She bought the used Ford Explorer from Jim Quinlan Chevrolet in Clearwater in September 1999, according to the lawsuit.