The last minutes of sunshine illuminated most (but not all) of a complex, richly textured cloud extension thrusting westward from the backside of a thunderstorm cluster. Gaps allowed blue-sky light to pass through, rendering a marvelously three-dimensional view for a two-dimensional photograph. Various elements moved different directions, rolling and spreading in slow-motion turbulence, through areas of light and shadow that themselves shifted vertically. This formation reminded me of an intermittent steam geyser’s belching, or an expansive, exploded stellar nebula. Sometimes it’s worth a little neck strain to gaze directly overhead at wondrous processes unfolding in the fluid canvas of the sky!