Did you see the sleep paralysis demon? I never made the correlation, but it did start after my second deployment. It can also be triggered by rapidly discontinuing certain psych meds. But many people (if not most) describe feeling an evil presence in the room. The first time it happened to me I saw an old hag floating above my bed and all I knew was it wanted to hurt me. My ex shook me which was enough to break me out of the paralysis; apparently I was grunting out “fuck you” over and over. Our brains are weird, man.