Due to the distance between the rear wheels and the back of a bus, you get a thing called "tail swing". During a sharp turn, the back end of a bus can pivot ou

Due to the distance between the rear wheels and the back of a bus, you get a thing called "tail swing". During a sharp turn, the back end of a bus can pivot out and hit something with the side of the bus behind the rear wheels. I don't know if this is what happened, but that's how it could happen.