Movie Commentary

This is an excellent closing scene to a well-made movie.  It starts with an extreme wide shot to establish the airport as the setting.  This shot uses deep space to make the viewer feel empty because Andrew is leaving and returning to his empty life in California.  A steady rhythm is set because of the consistent vertical and horizontal lines.   Here, the two main characters move left across the screen, showing Andrew moving away from his home.
The next shot starts as a wide shot and zooms into the two of them talking as the moment becomes more emotional.  This is set against stairs which create flat space with a constant horizontal rhythm so that the audience will focus on the two characters without any distractions.  Up until the final few scenes in the movie, Andrew has been wearing black, white, and gray to illustrate his lack of emotion.  Finally, at the end of the movie he begins to wear bright colors to show his returning emotion.  Additionally, in the final scene he wears red to show that he is in love with Sam who is wearing white because he sees her as being innocent. After they talk, Andrew moves up the stairs, which is understood to be the same direction as in the first shot, showing him moving away.
In the scene, Andrew's head is rounded by his hair style to show that he is gentle and caring, and Sam is a triangle head (with her hair down) to show that she is weaker emotionally.
As the conversation gets more intense, the camera changes from a medium shot to switching between close-ups of each character.  In each of these close-ups the lines in the frames all point toward the character we are supposed to be watching.  This is done with the stairs for Sam, and with the movement of the escalator that moves towards Andrew's head.  While the shots switch back and forth, the connection between the two characters is still apparent because of the virtual lines created by each person's line of sight.
After Andrew ascends the escalator, the next shot utilizes very flat space because of a blurring effect that focuses the viewer on Andrew and his emotions.  It also sends a message that shows him returning to his apathetic state of mind as he moves back toward his old life.
The next series of shots show each main character returning back to what their lives were like before Andrew was a part of them.  This montage of medium shots illustrates how each character is alone with Andrew gone.  Their movements are slow because without Andrew their lives are dull and boring.
After this, when Andrew is shown on the plane, he is in the center of the shot, framed by fast moving people on all sides while he is still.  This continues to reinforce the idea that he is returning to a life that does not suit him and leaves him alone and without meaning.
Next, Sam is shown in a telephone booth that frames her within a rectangle and visibly shows separation because of the closed doors.  Then, Andrew returns and opens the doors and reunites with her in the ending scene.