Why might problems result from something you did on an impulse? If problems did result, would you want to redo or undo your actions?

When you act on impulse you aren't thinking clearly. Your judgement is clouded by the emotion you are feeling in the moment. After you act on your impulse you may feel deep regret for something you may have said or done. You could hurt yourself and others. So you would want to undo your poor actions.

You might do something you never wanted to do in the first place, without thinking about it. For example, if you were startled by someone sneaking up on you, and you punched them in the face impulsively, and that person was, say, your mother, then you might want to undo your actions.