I saw this on the corner of Sunset and Cahuenga the other day. It is right by the Jack in the Box parking lot:
See those two pennies on the upper left side?
Walking a few feet further, I noticed another pair of pennies:
Walking a few feet further, I noticed only ONE penny:
And then finally, two pennies again (you can see these two pennies from a distance on the previous photo):
I have no idea what the story is. This is probably my most puzzling find so far. Ah so many questions!