Johnny's head collided with the cab's windshield and knocked it out.
His heads collided trying to sort out the four of her he could now see into a whole position.
Their heads collided as they both peered at the centre of the page.
She felt a thump as her head collided with the table leg.
If he'd been a few inches shorter, he would have broken my nose when our heads collided.
In the cellar, the visitor's head collided with a 4-by-8 overhead beam.
Her head collided with the bedpost and her world spun.
I fell fast asleep as soon as my head collided with the pillow.
His head collided with a table on the way down and he knocked himself out.
He slid across the stone floor until his head collided with the wall.