Good Advice, someone online made a claim that God gives them nightmares as way of prophetic discernment. The closet I ever came to anything like that was in Denver, CO. A local Occult shop had a dummy in the corner who would turn around if a evil person walked in. Some other Christians told me it turns it back when godly Christians walk in. So, one day when I got off the buss, I went in to witness to them. The dummy caught fire as I came in singing "what a friend, we have in Jesus..." While the store was burning down, I was telling its owner about Jesus. This was back in the mid to late 70's --- good luck finding the local news story about it. I once had a copy of the story, but lost it during a move.