Cannonball. Seen On the Street By Street Art SF Team on February 05, 2015 Location: Poplar @ 24th Street in San Francisco, Ca Artist: Steel MSK. Lango. Keb ICP. Joker ICP. Tags: Graffiti Writers, ICP Crew, Joker ICP Graffiti, Keb, Lango, MSK, San Francisco, SF - Mission - Poplar Street, SF - Mission District, Steel MSK