Have you seen ghosts before? I once woke up in the middle of the night and when I opened my eyes, I saw a man dressed in celtic garb standing at my door. I couldn’t see his face, but the rest of him was visible in the dark. It really freaked me out, so I turned away from the sight and went back to sleep. When I woke up the next morning, I wished I had tried to talk to him. 
Something similar happened a second time, but it was an old lady sitting in a chair right next to my bed. Both times, I could move so it wasn’t SP, but I find it interesting that some people have reported seeing “Old Hags” during SP.