One hit her forehead, like a punch from a fist, then another.

I'm about ready to hit my forehead on the table.

He hit his forehead with the flat of his hand.

Then must remain covered in dirt and have a steady stream of water hit their forehead.

The space was so small, he hit his forehead on the corner of the desk.

He hit his forehead with the heel of one palm.

I hit my forehead with the heel of my hand.

Will hit his forehead with the palm of one hand.

She hit her forehead with the heel of her hand.

Casper hit his forehead with the heel of one hand.