Amitabh Bachchan says that working in Ram Gopal Varma’s Department with advanced technologies was a unique experience. The 69-year-old actor plays a gangster, who turns into a politician. “In Department it’s not just the 5D camera, several other advanced versions were also used... a unique experience!! Ram Gopal Varma has done just that in yet another pioneering effort in Department (sic),” the actor posted on Twitter.