I always thought the demons were out to get me. Even as an adult I was absolutely terrified. Every now and then since I was a kid, I would have these episodes of fighting someone in my sleep and it felt like someone was pinning me down and wouldn't let me move. When I was finally fully awake, I would pray and search my house (or room when I was a kid) for what might have attracted demons. Nothing. I know plenty of JWs that have been through the same experience. Then one time I was reading something (don't remember what it was) but learned that I was actually having a form of a night terror but its called something else for adults. True fact: I haven't had one episode since I've faded although I now have Yoga DVD's in the house.
Oh yeah, as a teenager I was afraid to do Yoga because I might "catch a demon". So I always sat out that portion of gym class.