Black Ectoplasm Fog Ghost Picture

Mary sent us this black ectoplasm fog picture:

"I was at a Mexican restaraunt in Superior, WI with my friends when this was taken. Look at the very large black mass next to me (in the red coat). It freaked me out when we got these developed. This was taken with a Kodak Advantix camera in May, 2005 by someone we didn't know. There's no way that's a human finger casting the shadow either, he was at least seven feet away from us!

I have attached the original (with all three of us), and a picture that was cropped of just me and this black mass. I wonder what it means?"