Ok so as a kid I always had this imaginary friend named Casper. (I still do) Then today at school my friend and I were walking out of the girls locker room and I said, "Casper please open the door for us." I thought it wouldn't work but the door slowly opened for us and when we walked out we saw that there was no one there. I looked at the door and said, "Casper please close the door." And the door closed. I promise it's not a trick! I'm not lying I promise! It was so cool.