rain on windshield

I walked out of my building yesterday evening after work, and it was pouring rain. In the western sky, the sun shone brightly. I pulled my car into a nearby field, pointed the car toward the sun, and turned off the windshield wipers. I took a close up of the droplets on the windshield as the sun shone through. I guessed that there might be a rainbow behind me, given the conditions. Sure enough, when I drove away I saw the tallest and largest full rainbow of my life. The picture above does it no justice whatsoever.