She turned the dial ever so slightly, but Baker's spine arched and he gave out a strangled scream.

His spine arched, striking the back of his skull against the floor.

His spine arched, head coming up with a sharp cry.

Sarah's spine arched back and she set her jaw.

He pushed himself back from her, his spine arching.

She digs claws deep into their shoulders, arches her spine against them.

Her spine arched and the restraints rattled as she tugged against them.

's head was thrown back, his spine arched, as if a bolt of lightning were running through him.

The dog's spine arched and twisted as his front feet scrabbled in desperation.

Crouched about six feet away, its spine arched, was a bobcat almost the size of a calf.