I once swam to the depths of a river in Thailand before a splendid waterfall.  I was the only tourist who wore silly-looking goggles.  When I started swimming to the surface there was a rush of light.  Near-solid streaks came towards me.

That same light I saw today while I was driving.  Winter skies broken by streaks of sunlight, but the sun was not at all visible.  Just the brilliance, and how I was left gasping for breath.