I brown out a lot. I also have a really bad memory, so I'm not quite sure if that is a big part of it. I can get blackout with no major physical signs of being that drunk. I've ran into people I've met while black out and not had any clue I've met them before. For a week it happened 2-3 times. I thought my friends were playing a big elaborate joke on me. No, I was just that drunk.