To me it looks like a bald guy.. flesh tone and all. The bright spots look like horns or something... eyes are dark sockets below them.
I'm sorry I can't really see what you're seeing. I'm looking more at an object in the window and not something that's not actually sitting there. I'll have to glance at it when I'm not looking so hard for something to be there.
Wow, that's weird because now I can totally see it in the photo above.
Do you see 2 eyes? I can see 2 eyes and an almost skeletal looking face. I can't see the exact thing as your diagram shows though. I see something looking off more to the right (or would that be the left if looking from it's point of view) and I see small shoulders as well. I wish I knew how to draw on the photo, I could show you how I see it.
You know what else I find weird that I can see now. What I thought I originally saw is behind the thing you outlined. I can see it through the outlined thing, making the skeletal head I see transparent.
This is disappointing. I only have two train pics that are worth looking at. I remembered that most of the train day we had my daughter's camera as mine ran out of batteries. I'll have to get hers and add them here later.
Anyways, these were shot on a passenger car that was retired from service in the 1940's and has been quietly moldering ever since.