I voted for ghosts because I've seen one!

I was going to meet my friend's grandma for the first time. We got to her house and I went in first while she got something out of the car. I saw her grandma in the back room, sitting on a bed. I smiled at her and she smiled back. Just then, my friend came in. I told her I had met her grandma. She said I couldn't have - she was still at work... Whoever was there was nowhere to be seen.

We went through a family photo album and I picked out a picture of the lady I'd seen. It was her aunt, who was deceased. There were no pictures of the aunt on display in the house, so I really don't think it was a psychological trick by my brain. (I described her in detail before we got out the photo album.)

Weird, eh?