In a blackout, a person—your husband, for instance—stays completely ambulatory, going through all the regular motions, albeit clumsily. He does not seem “passed out” in the least, though he is not “there” either, because the most essential portion of him—the him you love—has effectively vanished. Leaving you speaking to someone who looks like your loved one and sounds like your loved one but is not him in any meaningful way.