We first encountered this film "The Subconscious Art of Graffiti Removal" as an installation at CCAC (now CCA) in San Francisco. Created by Matt McCormick in 2001, its premise lies in the concept that "emerging from the human psyche and showing characteristics of abstract expressionism, minimalism and Russian constructivism, graffiti removal has secured its place in the history of modern art while being created by artists who are unconscious of their artistic achievements." It was nice to stumble across this 5 minute clip on YouTube. The original, shot on 16mm film, runs for 16 minutes. Check it out.