The lesson

This was a very spontaneous grab shot with barely enough time to focus. It's all about the expression and the story being told by the image. The most important thing when shooting people and animals is to get the eyes sharp. For this reason, Casey's eye was  selectively sharpened. Her hair was cloned in order to disguise some blown out highlights. Again the rule of thirds comes into play when considering where her eye is placed in the composition. What you can't tell from this image is how incredibly photogenic Casey is. Sorry for intruding on your lesson Casey.