Fox News commentator Glenn Beck wasted no time responding to Titanic/Avatar director James Cameron's denunciation of him as a "f***ing a**hole" who is "dangerous because his ideas are poisonous." Cameron claimed that Beck had once called him "the Antichrist." Beck said on Wednesday that he did call him the Antichrist --jokingly -- when he was still working for the Headline News channel in 2007. "This guy has carried this joke around with him for three long years," Beck said. "The guy's making a billion dollars on a Smurf-murdering movie, and he's stewing about a joke nobody heard on a network nobody watched!"