Cannes: 14 Controversial Films That Made Audiences Literally Boo

Though Cannes has seen its fair share of movies with antiheroes, something about Robert De Niro's mentally unstable Vietnam vet Travis Bickle was especially upsetting to audiences. The seedy New York-set film features a bloody climax that had festivalgoers bickering about its questionable moral message. Martin Scorsese won the Palm d'Or for the film, but he didn't hear the audience booing him because he was busy filming New York, New York with De Niro.