Blu is the pseudonym of an anonymous Italian graffiti artist. He creates extensive stop-motion animation videos using graffiti, often in public places. His latest video is BIG BANG BOOM, which he describes as "an unscientific point of view on the beginning and evolution of life ... and how it could probably end."
The video is most impressive for its insane feats of stop-motion wizardry: at one point, a "jellyfish" is represented by a plastic bag apparently moving in mid-air. A "crab" gathers up a ball of junk that becomes impossibly large. An abandoned van (shown below) acts as a chameleon, with the entire van being painted over and over. All the while, this is happening in a public space with pedestrians wandering through the stop-motion frames. The amount of time involved in painting and building all this stuff is simply incredible.