Notorious - de Alfred Hitchcock

In this scene Grant leans in a doorway, silhouetted like some dark angel. From Bergman’s point of view, this Herald could be an angel or a devil. The devilish possibility is suggested by his name, revealed for the first time as “Devlin.” As he advances into the room to deliver the Call to Adventure, Hitchcock follows him in a dizzying point-of-view shot that reflects the hung-over state of the hero, Bergman, as she lies in bed. Grant seems to walk on the ceiling. In the symbolic language of film the shot expresses his change of position from playboy to Herald, and its disorienting effect on the hero. Grant gives the Call, a patriotic invitation to infiltrate a Nazi spy ring. As it is delivered, Grant is seen right side up and in full light for the first time, representing the Call’s sobering effect on Bergman’s character.
As they talk, a crown-like, artificial hairpiece slides from Bergman’s head, showing that her fairy tale existence as a deluded, addicted princess must now come to an end. Simultaneously on the soundtrack can be heard the distant call of a train leaving town, suggesting the beginning of a long journey. In this sequence Hitchcock has used every symbolic element at his command to signal that a major threshold of change is approaching. The Call to Adventure is disorienting and distasteful to the hero, but necessary for her growth.

-Christopher Vogler, The Writer's Journey-