people who explode on others
People who explode on others are so weird and immature. I'm not talking about serious argument-type or reasonable anger, but out of the blue, uncalled for rage; People who are having a bad day and take it out on others. Yes, your friend made a mistake by teasing you when you're tense. There's no need to yell and curse them out just because you're stressed.
And when they don't apologize after? That's even worse. It's one thing to lose your temper and apologize, but acting like it was justified or the other person's fault? insane.