Imagine pissing in one these suckers..
<img src="http://www.ocf.berkeley.edu/~kirstin/photos/japan/seiryumonm.jpg">
<i>It's located in a restaurant called Seiryumon in the Shinjuku district of Tokyo. When you begin peeing into it, music starts to play, the mouth begins moving back and forth (forcing you to to the same lest you end up peeing on the wall), the giant face begins rotating to reveal another face on the back of it, and the camera in the figure's hand begins flashing, making it look like your picture is being taken.</i>