Its normal for some persons to piss you off, I get that almost every day. People asking questions they already know the answer to, some making comments that will make you want to plant a bomb in their head. And sometimes I do it, I make my close friends angry, I've lost great friends with the words I say to them even when I don't mean it.
Please no matter how angry you are at someone for the actions they do or the words they say. Don't do anything or say anything back at them at that moment or else you might regret it later in life. If you ever get in such a situation, just walk away and cool yourself down. Do something else and think things through. After you are calm, then make your decision. It's safer that way.
Remember, don't let your anger go down with the sun; always learn to control your anger.