What the Hell is That???

Okay...Astri and I need some help.

Astri was taking a few photos for her blog that were related to the Norwegian pewter plates she has collected for many years.  The artist passed away a short time ago, so no new plates are to be made.  She just completed her set with the very first plate in the collection...a hard find.

The first picture below is a simple photo of a few of the plates above our fire place.

Now...this is where we need help.  Immediately after this photo was taken I sat down on a piece of furniture just to the left of the photo area.  Astri took another photo from the SAME spot less than one minute later.  The top of my head can be seen in the lower left hand corner of the wall mirror.  But...what the hell is that behind my head!!!  We have spent hours trying to figure it out...showed it to some of our kids, etc.  We have no idea what it is...can you help????

A weird spirit behind me?

Here is a closer shot of the mirror photo.  Our youngest is really creeped out by it.