Imagine just standing there on the corner... waiting for the walk light... with no traffic coming... you could break the law and just walk against the light, but damn it... you're trying to be good. Then you turn around and see the other walk signal showing you how it feels about you. Whoever did this is hilarious.
I'd like to picture someone on their last day replacing a bulb or something and modifying the walk signal as a sign off to the job. Just waitin for the day for someone to see it and show it to the world. Mission accomplished friend, mission acomplished.