Really confussed girl.?

I have used it before with a friend just messing around one night. We were in her room, sitting on the bed (kind that has a roll out bed underneath) and it was just us two. With the kind of bed she had there was NO way a person could be under it to do what happened. So we were "talking" to a spirit and asked it questions. It answered. It told us to open the front door and personally invite in spirits-in other words welcome them in. After having done that we returned to her room and asked where and how many were in the room. It answered saying there were 3 and that one was by the window. At that moment the mattress jerked up and it was able to move us from our spots on the bed. We jumped off the bed and ran out. We wanted to make sure that it wasn't just our mind so we looked for her brother. He was in the living room. The next day she called me and asked what was the last thing I had done. I told her I had just gotten out of the shower. Her voice changed. I was like "what?" She said that she was using the board alone and asked it what I was doing. It spelled out S-H-O-W-E-R. I never used it again! She and I also stopped being friends a short time after...