hmmm. I'm angry because I don't know the speed limit is 65 instead of 45. If I'm driving 50, I think the speed limit is 45.

or

My default reaction is to be angry at everything because my car only goes 50, and that is ruining my life, which make me feel slighted because I can't buy a better car in this economy, and if I can't drive faster I better not be passed by somebody who doesn't give a hoot about the chi I've found because I have to drive so slow...

or

I would get angry trying to figure out why I should be angry, because I have no reason to be angry.