Dancing Apparition Ghost Picture

Gary Clarke sent us this wonderful ghost picture of what appears to be an apparition dancing with the guests. Is it an apparition, or camera error? The story is just as intriguing...

"I was at a wedding in Aldershot on Friday, the 25th of September. At the After Party I took a photo of my uncle dancing on the dance floor. I believe you can clearing see a man in front of him wearing a black suit with a white collar shirt. Also, you can just see through him to still see my uncle's shirt color, proving he couldn't be human. No one knows who this was or could be?"

We were unable to discern the exposure time, so we cannot be sure if it was lengthened, which happens with some flash settings. It is possible the man in the vest (to the left) was dancing with whoever this person was (who then swung out of frame). Is it a ghost? You decide...