1.   Are they slapping their foreheads and questioning their collective sanity?

2.   Are collectors likely to be slapping their foreheads in disbelief, wondering what the library had in mind?

3.   Feel free to slap forehead with palm.

4.   Foreheads will be slapped.

5.   He is much given to energetic tics like slapping his forehead with the palm of his hand.

6.   His advisers, watching the program at home, slapped their foreheads in disbelief.

7.   Imagine the renegades slapping their foreheads when they realized their silly mistake.

8.   In disbelief, he spun around, bounced his club hard off the ground and knocked his hat off while slapping his forehead.

9.   In the bottom shot, Cowboys coach Tom Landry slaps his forehead in despair.

10.   Migraine sufferers, though, are unlikely to slap their foreheads at the thought.