NEW YORK, NY (REUTERS).- The infamous (and anonymous) graffiti artist Banksy is pulling what may be his biggest prank ever at the Sundance Film Festival — with the help of fellow Brit Rhys Ifans. The guerrilla pseudo-documentary “Exit Through the Gift Shop,” billed as “A Banksy Film” and narrated by Ifans, will have its world premiere Sunday night. Hopes are that an adventurous distributor will pony up as many millions for the film as Banksy earns for the “street art” he secretly leaves in urban spaces. Several of his works have appeared on Park City walls this week. The film, billed as an exploration of “street art,” takes audiences on hairpin twists and turns as it chronicles renegade urban artists and pranksters from around the world.