How'd he do that?

This photograph is of sunset in Normal, IL with a strange chunk of cloud and the dying remnants of a jet trail. The illusion is that you are looking down through the clouds to water or something below. That illusion is created by simply turning the photograph upside down, which changes your perspective. I left just a tiny bit of branches in the (in this orientation) upper right hand corner as a clue. I often enjoy playing with reorienting photographs.

Here's how it looks right side up.