All afternoon before I made this photograph the valley reverberated with thunder, lightning and rain. As I sat in the truck at Tunnel View, the rain abated for a while and the overlook filled with people. Suddenly the heavens opened up and sheets of rain came down. After watching people run for their cars I found myself almost alone at Tunnel View. A rare occurrence to be sure. 30 minutes later light began to glow serenely on leaning Tower. I made some images, but a few minutes later the real show started. Surreal Mammatus clouds filled the park and I was able to make this very satisfying image.