He turned his head to speak over the back of the seat.

I made an effort and looked over the back of the seat.

With one arm over the back of his seat he looked around.

Other times it is at the back of my seat.

There was a television set built into the back of the front seat.

A panel came open, in the back of the front seat.

She focused on the back of the seat before her.

Larry had his arm across the back of the seat.

She held on to the back of the driver's seat.

But he could not have seen her without rising and looking over the back of his seat.