I took this while riding over a bridge in the Northern Neck a few weeks ago. I just thought the clouds looked cool over the bridge.   It was just an ordinary shot though so I was wanting to try something new with it so I opened up the Lightroom 5 develop module, dropped the exposure and then activated the all new radial filter.  From there I brushed over the circular mirror to highlight the bridge and clouds and reset the expose in the circle to its original setting, then I set the feather to 65% to ensure a smooth transition and that was it.  It literally took less than one minute to make the adjustment.  I think it's such a cool effect.  Not something you can use all the time, but with the right shot it can be lots of fun.  Have a great day.