'They also came close to having another artistic collaborator: the infamously anonymous street artist Banksy. “Banksy was not yet the famous Banksy that he is now, and I dug him,” Cuarón says. He wanted to have the graffiti artist work on the film in some way, so he tracked down Banksy’s manager and arranged a meeting at a coffee shop. Cuarón sat across from the manager, who started grilling the director on his ideological stances. Banksy was nowhere to be seen. The meeting ended without resolution. Only after it was over did a person nearby excitedly tell Cuarón that a silent figure had walked in during the meeting and placed himself behind Cuarón the whole time, hidden from view, then left before Cuarón could turn around. Cuarón suspects it was Banksy — who didn’t sign on for the film but reportedly gave permission through his manager to use one of his works, a stencil of two cops smooching, in the background of one of the shots.'