Tell me about your spirit encounters and ghost stories!

While I have had some strange things happen, I do not believe I have ever seen a ghost or encountered a spirit being. There are logical explanations for everything, we just sometimes don't know what those explanations are.

I've never had an encounter with a ghost or would I want to. No amount of money in this world would make me want to have a "date" with a ghost. But I've heard stories that may be construed as supernatural. One story is about my niece when she was three or four years old and this story was told to me by her sister. She said she saw her sister playing with a ball and throwing the ball into the room. She was sitting outside the room and the room was empty. No one was at home except for them. Then she saw the ball was being thrown out of the room to her sister. And her sister was laughing as if she was playing with someone. I don't know if the ball bounced back to her sister after hitting a wall but my niece said the ball seemed to have been thrown out by somebody from inside the room. I don't know what to make of this story but it really did spook me a bit. Now my niece is older and she can't remember the incident.