Alfredo Adan decided pedestrian crossings could be made a whole lot more fun. So what did the Los Angeles-based artist do? He fashioned a bright yellow fist and attached it securely to the button of a busy crossing. Those crossing were thus invited to "fist bump" the hand in order to operate the pedestrian signals controlling the lights. The project took Adan four months from the time he had the idea, to completion. But we think it was definitely worth the time and effort, simply for the 'LOL' factor. Take a look at peoples' reactions to the clever prank!