I got very angry after a long time

I rarely get angry. Just few hours ago, I got very angry. I literally shouted very loud. I don't even recall when I got so angry last time. Though I was shouting I was pretty much in control. But I had to respond to someone who was constantly shouting on me. I got calm within few minutes, and started talking to that person. I could have stopped my self as I was in control but I didn't want to that time. Now I am here writing about it.