Look behind you is of course part of the standard audience participation in pantomime, a particularly English form of entertainment. It is also good advice to photographers because often good things are happening all around us and taking a moment to look up, down and all around can result in you spotting other good opportunities.
That was certainly the case for the photograph above. I was on the way to the Sol Duc falls and had stopped to photograph the mossy rocks that are part way to the falls. In taking a moment to look behind me I noticed that there was interesting light in the trees behind me. I shifted my attention to the trees for a little while and was fortunate enough to get a shot that, with the application of my standard B&W preset, resulted in the image at the top of the page.
So far I like this more than my mossy rock pictures and it just goes to show that looking behind you can pay off if you make a habit of it.