She shook her head in confusion, not sure what had been expressed.

The woman with him shook her head in confusion.

She shook her head in confusion, wondering when reality had ceased to exist.

Shaking her head in confusion, she gripped the back of a chair.

"I don't understand," he replied, shaking his head in confusion.

A moment later, he shook his head in confusion.

He stepped out into the street and turned left, still shaking his head in confusion.

He put his hands to his head, shook it in confusion.

He looked back at the other, shaking his head in confusion.

Riker shook his head in confusion and let the subject drop.