In the early part of summer, around 3:00 in the afternoon, the sun hits the roof of the small outdoor amphetheatre in the back of the Disney Concert Hall at an angle to that the light cascades over the side of the building.
Above on the right, this is what that looks like from 41 stories up. Below on the left, this is what it looks like from street level. [Feel free to click on either to see a bigger view.]
(Hey, what kind of tree is that in the foreground?)