One of the tensest moments in Rosemary’s Baby (1968) wasn’t achieved with special effects—it was filmed in real traffic. For a pivotal scene, director Roman Po

One of the tensest moments in Rosemary’s Baby (1968) wasn’t achieved with special effects—it was filmed in real traffic. For a pivotal scene, director Roman Polanski wanted Rosemary’s frantic walk across a busy New York street to feel completely authentic. Rather than closing the road, he had Mia F…