An angry person starts fights; a hot-tempered person commits all kinds of sin. (Proverbs 29:22 NLT)
Some people are a "powder keg" just waiting to explode! You can see it in their expressions and hear it in their tone of voice. You can feel the rumbling just beneath the surface right before the "volcanic eruption" of their angry tirade. They're often bullies looking to get their way and they really don't care who they hurt in the process. Until they deal with the root causes of their anger the best thing you can do is avoid them, lest you become like them (cf. 22:24).