What the hell is that?

So after I took pics of my favorite new deck of cards, T could not stop asking, "Can I take a picture of my cards, too?" So I handed her over the camera, and these are the best of the results. I admit that I cropped only the one of her foot. The others are in their unvarnished original state. As I was scrolling through, I see the last one. Huh? What the hell is that???




Well, yes, that is my ceiling, but what is that odd circle-looking spot?? Shit. Turns out, I think I have a roof leak. If not for T's photographic abilities, I doubt that I would have discovered it for quite a while.