He turned her loose, a look of astonishment on his face.

I'd never seen such a look of astonishment in a child's eyes.

There was a look of mild astonishment on his face, she wasn't sure why.

The Professor had a look of astonishment on his face.

A look of total astonishment crossed the older woman's face.

The look of astonishment on his face was answer enough.

And a moment later, a look of blank astonishment had come over her face.

He turned to me, a look of astonishment on his face.

He staggered, a look of total astonishment on his face.

David looked up and back, a look of astonishment crossed his face.