Actor Shia LaBeouf hit the headlines on Sunday when he walked out of a news conference for Nymphomaniac at the Berlin Film Festival, later appearing on the red carpet with a paper bag over his head.
The film is controversial enough on its own: through graphic sex scenes, director Lars von Trier recounts the erotic history of a woman (played at different stages by Stacy Martin and Charlotte Gainsbourg) from childhood to the age of 50.
In 2013, producer Louise Vesth told The Hollywood Reporter: "We shot the actors pretending to have sex and then had the body doubles, who really did have sex, and in post [production] we will digital-impose the two. So above the waist it will be the star and then below the waist it will be the doubles."
Alongside footage from the Nymphomaniac news conference, critics at the screening in Berlin discuss the content of the film in this clip.