Out of Focus or Not?

I was looking back on the images I made, with my Viewpoint Gallery workshop students a few weeks ago, and I took a closer look at 2 images that I thought were out of focus, trying to determine what went wrong. Once I enlarged the images I discovered they were not out of focus but that the fog cloud had shifted and the sun projected the shadow of the tree onto the fog. If you notice the tree behind the shadow is in good focus. I thought that was pretty cool!

4010-180318-_5D44400.jpg1/1250 sec; f/36; ISO 100; 176mm

4010-180318-_5D44403.jpg

1/1250 sec; f/36; ISO 100; 176mm