11.   He unwound his long legs and stood up, arching his back and stretching.

12.   Her back was arched and she was not breathing.

13.   Ambrosino grimaces, groans, arches his back.

14.   And I was told to stop arching my back.

15.   Arch your back until it screams.

16.   Arching his back and waving languidly toward a waitress, Affleck exposes a smeary splotch on his right shoulder.

17.   A flamenco dancer, Antonio El Pipa, stepped forward, his back arched like a drawn bow as his heels clattered cross-rhythms.

18.   But these days, even if she can tame the body and still arch her back just so, it is her mind that is playing tricks.

19.   Finally he began playing swooping patterns as he arched his back.