The main problem with emotional responses or outbursts is that they feel logical at the time. You don’t feel like you are being irrational when you’re seething with anger because someone cut in front of you in line or when you’re slamming the phone down after a heated discussion with the bank. It’s only after the emotion clears that you are actually able to see your behavior for what it was.
In fact, you probably view these actions as appropriate while you are doing them and get some sense of satisfaction out of doing them. Which is weird because if you were to see someone else doing them, even while you are enraged, you’d likely see them as being completely out of place. Yet you can’t see yourself when you are emotional.