There's more than one way to make graffiti. Option 1: Use a paintball robot. Option 2: Make rainbows-on-the-go with a bicycle. Option 3: Use a hanger and a spray can to speed tag on the run. Option 4: Use an iPhone app and a projector to paint with light. Option 5. Do it with your eyes.
Or... Option 6: Dynamite.
Above, street artist Aleandre Farto detonates plaster and brick to create large, "etched" urban murals. Music by Orelha Negra.