A couple of years ago, one lunchtime, I came across a sixteen year old boy who was at the corridor light switch, switching the lights on and off, on and off, on and off. "Mark", I said nicely, "please don't do that. You might fuse the lights." On and off they went. I became a little more forceful but still Mark ignored me and kept on - on and off. Finally, I came real close to him and bellowed at a thousand decibels, "MARK! GET YOUR HANDS OF THAT LIGHT SWITCH NOW!" Mark was so taken aback that he ran out of the school, all the way home. Later, an office worker told me that Mark had returned with his father who was shouting the odds in the school reception area, saying memorably, "Mark doesn't like people shouting at him!" Crazy world.
Here's what Wikipedia has to say about anger:-
Anger can be an active or a passive emotion. In case of "active" emotion the angry person "lashes out" verbally or physically at an intended target whether justified or not. When anger is a "passive" emotion it is charactererized by silent sulking, passive-aggressive behaviour (hostility) and tension."