When two characters maintain the same left/right relationship to each other, orientation and screen direction are established.
filmmakers need to find ways to represent the three-dimensional world on a two-dimensional screen. In order to achieve this, it's important to establish the orientation and screen direction of the characters. Murch explains that the 180-Degree Rule is essential for maintaining consistency in left/right relationship and orientation between characters. Breaking this rule can be used intentionally to create confusion or disorientation in the audience. The example given is from The Shining, where Jack, possibly hallucinating and becoming possessed by the hotel, meets the caretaker Grady in a bathroom.