I have seen shadows move. One time I was watching my brother and sister, and my sister and I were sitting on the floor making bracelets when I saw something black go down her arm and go to the floor. It almost had the quality of a feather but when I looked at the ground nothing was there. I asked my sister if she saw it and she said no but she had felt something touch her arm. That is how I know I didn't just imagine it. There was another time were I looked in the bathroom mirror saw the shadow of a person in the corner of the living room, I looked again and it was gone.