I was just walking around the neighborhood with my camera taking shots of "anythings" as I call them, whatever catches my eye at the moment. I saw that metal nut and zoomed in on it and snapped. Then when I went home and transferred the photos from the camera to the computer, I noticed that it looked like a nut from a tree at about 11 o'clock beside the metal nut. It was just a coincidental juxtaposition of two different kinds of nuts beside each other. I was going to go back and check if that was a real nut, but I knew I'd be looking for an hour before finding it again.