I have a child with RPS. The child experiences pain because the nerves are going crazy and mess up. He/she goes to a massage therapist that does a special technique that helps with the pain. Our body's a full of energy and each time the energy is released and some goes into the therapist, she even experiences bruising from this, the therapist. One time the negative energy was so bad my wife said she put her arm into the room and felt like static electricity, as well as starting to feel a headache as she entered the room.
Could it be that we give of energy both positive and negative and these spiritual or demonic experience are associated with this energy almost like telepathy. This could explain why so many think they have had an experience while playing a game or watching a scarry movie?