1.   Frankie felt his face redden and his hands clench themselves into fists.

2.   The shock was terrific, he gasped into his oxygen mask, his hands clenching involuntarily.

3.   In her own room she stood, her hands clenched and pressed tightly against her breast-bone as if to ease the terrible ache and fear whirling there.

4.   That stung, and she swung round in the seat, her hands clenching into fists.

5.   His hands clenched into fists.

6.   His calloused hands clench, relax and then clench again.

7.   His hands firmly clenched the wheel.

8.   Her hands clench her stomach as if she has received a body blow.