So much of Exit Through the Gift Shop is shrouded in mystery. The documentary film’s (purported) creator, Banksy, is an elusive British graffiti artist whose identity is unknown, even though he’s the darling of the international art world who routinely sells screen prints for six figure prices. In his first foray into film, Banksy presents us with a characteristically enigmatic but well-executed piece of pop art, billed as “the world’s first Street Art disaster movie."