He saw a black form at the back window of the car.
He got up and walked over to the back window.
As people walked by the police car to go about their business, they all looked into the back window.
Behind them, his mom was looking in the back window and talking with the other two men who were going.
She didn't answer, instead rising up enough to see out the back window.
She always went straight to the first floor, to the back window!
All during the ride, the two kept looking through the back window.
She looked out the back window, but couldn't see a black car.
My eyes are locked on the little white light that I can see through the back window of his car.
He looked at it, and turned his head to look out the back window.