What's happening here? Although the scene may appear somehow supernatural, nothing more unusual is occurring than a setting Sun and some well placed clouds. Strangely, the actual sunset was occurring in the opposite direction from where the camera was pointing (you can see my shadow at the bottom of the enlarged picture below). Pictured above are anticrepuscular rays. To understand them, start by picturing common crepuscular rays that are seen any time that sunlight pours though scattered clouds. Now although sunlight indeed travels along straight lines, the projections of these lines onto the spherical sky are great circles. Therefore, the crepuscular rays from a setting (or rising) sun will appear to re-converge on the other side of the sky. At the anti-solar point 180 degrees around from the Sun, they are referred to as anticrepuscular rays. This explanation courtesy of NASA's Astronomy Picture of the Day (APOD) web site; click on APOD to go to APOD and see their picture for September 17, 2006, which happens to show Anticrepuscular Rays Over Florida (photo taken by Daniel Herron), along with the explanation quoted here for what anticrepuscular rays are. You can also click on APOD2 to see another display in Colorado from 2001, or APOD3 to see a display at Horseshoe Canyon, Utah from 2003.