I'm not a Witness, but I've had two experiences with the supernatural in my life and both scared the living crud out of me. I did nothing to bring them about, nor was I dabbling in anything. No Smurfs were involved and I had friends with me at the time, so it wasn't my imagination. There are spirits abroad in the land, and not all are good. You learn to pick up on them, though. You can feel cold drafts, the hair on the back of your neck goes up and there's a genuine feeling of dread...a palpable sense of evil or malevolence. I know people who thrill after this type of thing and chase after it. I tend to leave it alone. Having said that, the power of suggestion in various religions and groups can combine and effect people. There are also stories and myths that go around...like hitchhiker stories, ghost runners and the sort. In certain circles I hear the same stories in many variations.