Maybe this happens more often over here, or maybe I'm just noticing it more now. But for some reason, we've had a number of instances where the clouds were "just right" to let the sun streak through in rays that just look cool.
Outside my office window in Munich:
;)
At the Stuttgart train station:
;)
At the Munich Ostbahnhof (east train station):
;)
Nice work, Mother Nature. Keep it up!