re: Sharp . . .
Reminds me of a scene from Panama. I was riding in an open Huey (UH-1) after being picked up in the rain. As we headed back to base (Hill 88), I could see the double rainbow below us. It was sharp and clear, two complete, concentric rings of color, with the tiny shadow of the chopper in the center, all cast down on the tops of the lush, ever-green jungle.
Beautiful.
Dan