Like his street art, Banksy’s documentary Exit Through the Gift Shop is a prank comment that at times provokes some serious thought. It tells the story of Thierry Guetta, a French-born Los Angeles fashion designer employed within the street-art community to film it at work: scaling industrial sites, wallpapering concrete structures or stencilling cutesy tags on military barriers. As with every scenester, Guetta has artistic ambitions of his own and, with some charitable encouragement from Banksy, duly gives himself an edgy nickname (Mr. Brainwash) and heads for the bright lights of the art elite–announcing his arrival with a ritzy and well-attended LA showcase.