Why is it important for a patient to remain still during an X-ray exam?

An X-ray is a machine that uses radiation to see "through" to your bones, but since it has to produce an HD picture of something INSIDE you, it's gonna take a while. If you stand still, it can produce the image easily. If you move, it will come out blurry. It's almost like taking a picture or painting someone, or maybe even sculpting someone.