This is the path a Roomba took to clean a room. As you can see, it's pretty haphazard. But what did you expect -- it's just a stupid robot. Honestly, I'm surprised the little deviant didn't spend the whole time pleasuring itself in the corner by repeatedly running over a power cord.
The shot was taken by shutting off all the lights in the room for 30 minutes and taking a long exposure of the path the Roomba took while cleaning up.
While I despise all things robotic, I've got to admit -- whoever took the pic must have balls of triple platinum. Leaving a robot alone in a dark room for a half hour? That's crazy talk.