anger

One of the first thing my actors learn from me is that anger is a secondary emotion.

Underlying all anger is either hurt, fear or a combination of both primary emotions.

Unless the actor shows the impetus - thus the layers - of his or her character's anger (hurt, fear or both) the performance is pretty one-dimensional, unconvincing and forgettable.

Showing all the complexities of the character's emotions makes the performance "unexplainably" memorable!

So, next time you get pissed off?

As yourself what hurts ... what you're afraid of ... or what hurts and scares you.