He rubbed his chin, stared out the window at the site.

I don't even have to rub my chin over that one.

He rubbed his chin, stood up and walked back to the window.

She had never thought to see him rubbing his chin like that again.

He sat down and rubbed his chin on that one.

Rubbing his chin, he decided to take the paper along.

The huge young man rubbed his chin for a moment, thinking.

He rubbed his chin, then looked back at the Marine.

He rubbed his chin and looked around, as if thinking.

Frank rubbed his chin as he thought about what I'd written.