He scratched his chin, working out the distance from the tunnel to the woman's home.
I got a cigarette out and scratched my chin with it.
The doctor scratched his chin, trying to decide how to continue.
I scratched my chin with it and tried to picture her face.
Carl scratched his chin, a sign that he was thinking.
I scratch my chin, turn to sun a little, gestures for effect.
He reached out one hand and scratched her chin just where she liked it.
The judge scratched his chin, as if he himself was overwhelmed.
Old John scratched his chin and leaned forward a little.
He scratched his chin and looked at the rest of us.