1.   I saw him rub his hands together, take a deep breath, straighten his back, and then, begin again.

2.   I can feel her resolutely straightening her back.

3.   No need to straighten the back, stiffen the jaw and act rich.

4.   Pressed for an explanation, she opened her dark brown eyes wide, straightened her back and declared that the Publishers Clearing House made her do it.

5.   Then she straightened her back, composing herself.

6.   They straightened the back, pushed up the bust and sucked in the stomach.