Actor Shia LaBeouf wears a paper bag on the red carpet

US actor Shia LaBeouf has walked out of a news conference for director Lars von Trier's new film Nymphomaniac at the Berlin Film Festival.

LaBeouf left after 10 minutes, quoting footballer Eric Cantona's famous 1995 line: "When the seagulls follow the trawler, it is because they think sardines will be thrown into the sea."