At the same instant he felt as if an invisible hand had given him a strong push, directly in the center of his back.

A knee drove hard into the center of his back.

A similar ridge ran down the center of the dragon's back.

He aims his pistol at the center of her back.

Wedged tight against the center of the boy's back was a ball.

It has a yellow head, purple body, and a large black spot at the center of its back.

Suddenly something hard struck him in the center of his back.

She locked her hands at the center of his back and cried harder.

Then, very deliberately, she aimed for the center of his back.

I stopped rubbing and kept just one hand in the center of her back.