Exaggeration is used for the extremities of an action, to emphasis a pose or emotion to make the story click with the audience. It allows the audience to get a grip on how the character is feeling, for example furrowing the brows and stopping the shoulders shows how great the sadness is. However, there is a balance necessary in this principle-exaggeration on all the elements can cause an unsettling scene.
Exaggeration in movement.
Exaggeration is used to emphasis emotion in characters.