Seated with his back almost to the door, Chuck kept waiting for Trip to turn in from the window.
She held a chair for him to be seated with his back to the wall.
"Time for a break," she told a thin man seated with his back toward them.
Fortunately, he is seated with his back toward the entrance.
Seated with his back to the wall and facing the door, he ate a good meal.
He was seated with his back to the water's edge where the island narrowed, so she couldn't appear behind him.
A man was seated with his back to the Enterprise bridge crew.
I seated myself with my back to a wall.
The Captain was seated with his back to the door.
In old China it was traditional for a superior always to be seated with his back to the north when he received an inferior.