A laughing man is sitting in a camp chair with his arms outstretched, while a man in a black shirt next to him is stuffing his face.
both men were stuffing their faces
One man is laughing, so they cannot be both stuffing their face.
A man cannot be stuffing his face while sitting with his arms outstretched.
Both men are are not the same thing If one is laughing and the other is stuffing his face.