Abstract Thursday: Spooky

This afternoon I needed to take some photos of our lounge.  I waited until W was out and then took a few shots of the empty room.  I then uploaded them onto my iPad and was shocked to see that the room wasn't as empty as I had thought.  It had seemed nothing was there, but on the picture, sitting on the sofa, was this..... thing.  It looked like some sort of witch, with a grotesque green face.  I checked back in the room but couldn't see anything; everything looked bare.

It's very quiet in the house now, and I'm all alone.  Or am I......?