Who should be responsible for the accident? So I was hit up with a hit and run that I had no idea I commited. He stayed long enough to exchange some information but left the scene before police arrived. I felt I hit something , stopped the car and was looking out my bag window and there was a shopping cart there that I assumed I hit! Hello It probably will not make any difference. All of a sudden a loud bang as a car backed up into the back driver side of my car.