His head was exactly the shape of an egg, and he always perched it a little on one side. 
His head was a perfect egg-shape, and he always rested it on one side.
His head was a perfect square shape.
A baby is crawling around.
A man is playing football.
Two flags being waved.
There was a period of unusually low temperatures last year.
The man and lady are taking a nap.
The settlement was protected on all sides by the mountains.