1.   A bullet ricocheted off the rock he was hiding behind.

2.   A cynical smile crossed his face, hidden behind the lip of the beer glass.

3.   Baer promptly did so, hiding behind a cloud of legalese to justify his action.

4.   By this time his workaholic lifestyle was well established, though always hidden behind his easy friendliness.

5.   Dale hid behind some garbage cans in the alley until the men passed.

6.   Dark forms seemed to hide behind the trees.

7.   Further along the grassy track, half hidden behind trees, a church roof can be glimpsed.

8.   He took out a handkerchief and dried his face, hid behind it to prepare an expression to meet his wife.

9.   He used to hide behind the fact that I made him angry and I was responsible for his physical violence.