Revered moviemaker Roman Polanski has sparked a new controversy at the Cannes Film Festival after storming out of a press conference. The director grew restless during a tribute to the cinema and complained journalists were asking "empty" questions, before inviting fellow moviemakers including Alejandro Gonzalez Inarritu and Wim Wenders to join him in walking out. Polanski, whose film The Pianist won the top prize at the festival in 2002, joined 27 major directors who were taking part in the homage to the movies, dubbed To Each His Own Cinema. When the conference's moderator announced that journalists had just two minutes left to ask their remaining questions, Polanski took the microphone and said, "It's a shame to have such poor questions, such empty questions." He then stood and said, "Frankly, let's all go and have lunch," before walking out.