Jim Carrey has taken aim at pro-gun activists by shooting a hilarious new parody song and video for comedy website FunnyorDie.com. The movie star plays both the frontman of country combo Lonesome Earl & The Clutterbusters and late gun fan Charlton Heston in the promo. Backed by the heavily-disguised Eels, Carrey sings Cold Dead Hand, which warns of the dangers of gun ownership, which has become a hot-trigger issue in America following massacres at a cinema in Colorado and a school in Connecticut last year (12).