1.   But forgive him if his voice cracks or he stumbles over a word.

2.   At times his voice cracks and he weeps the words.

3.   His voice cracks for a moment, and his emotions threaten to take over.

4.   Just listen to his high-pitched voice crack.

5.   And then her voice cracks and she begins to weep for the first time in a long phone conversation.

6.   His voice cracks, his shoulders heave and tears slide down his smooth, delicate cheeks.