The Curious Case of Benjamin Button Paul Ekman is an American psychologist who was a pioneer in the study of emotions and their relation to facial expressions, has created an 'atlas of emotions' with more than ten thousand facial expressions, and has gained a reputation as "the best human lie detector in the world." Here are some of the faces that Brad's face can make (according to Paul Ekman): Similarly, the character of Gollum in The Lord of the Rings Trilogy was a difficult character to bring to life. This video takes you on the journey from idea to big screen. Here's another movie that required an incredible amount of technology. A look inside the animation of Avatar.