1.   Burun clenched his fists and bit his tongue to stop himself from shouting out.

2.   Clench your fists and bring them up to shoulder height, knuckles upward, elbows at your sides.

3.   Clenches his fist towards heaven and cries for it all to come tumbling around him.

4.   He bit his lip, clenching his fists.

5.   He clenched his fists and remained where he was.

6.   He clenched his fists at his sides to strengthen his resolve.

7.   He clenched his fists even tighter.

8.   He clenched his fists in frustration and annoyance.

9.   His fists were clenched at his side, his eyes shut tight.

10.   Ibn Fayoud clenched his fists to stop himself trembling.