You may have people come up to you after a party, and tell you something you did, that you don't remember doing. You may wake up and not know where you are. You may not remember how you got home. This is a blackout and they are very scary. You could have done anything.
Most blackouts last a few minutes but some can go on for hours or days.
Describe any blackouts you have had. Think for a minute of what you could have done. You could have done anything and you wouldn't have known it. People who are powerless cannot keep promises they make to themselves or others. They promise that they will cut down on their drinking, and they don't.