Rage may be the defining behavior of the narcissist.
Narcissists are grandiose. They feel superior to you and me. Because they feel so superior, they need to be in control all the time. Because they need to be in control, they challenge authority constantly. They don't follow rules, they take advantage, and they emotionally and verbally run over every one else. When they are unsuccessful - if someone challenges them - they RAGE.
When the narcissist rages, it is because he feels negated. He feels his absolute being is annihilated. His very existence is at risk if he is not the one in control. He must restore balance, and balance is only possible when he is in control. To be in control, he must eliminate the source of his frustration.
To maintain his control, he preys on others emotionally, physically, sexually, financially....