he immediately attempts waking you up in a firm, but careful and calm way- he does not want you to do any damage or harm to yourself during the unconsciousness. he gets very worried and anxious for he knows how truly horrible nightmares can be, and he’s going to ensure that you are not waking up alone in a dark room. he opens his eyes right as soon as he feels you begin to twitch.
he’s a light sleeper so he is normally very alert during his sleep.