1.   Besides which, I needed an ally at the shop, some one to watch my back should things get hairy.

2.   But Yeltsin will have to watch his back.

3.   Drug traffickers and guerrillas mix with spies and mercenaries, all cautiously watching their backs.

4.   Enjoy it, but watch your back.

5.   Other agents are watching his back, he says.

6.   She watched his back for a moment.

7.   I stood in the driveway and watched him back out and pull away.

8.   He watched her back as she came to join them.

9.   And Pioline just might want to watch his back.

10.   Anna Paquin, watch your back.