Remember, analyzing a scene does not mean to summarize it! Don't just explain what happens in the scene, simply retelling that part of the story. Rather, focus on the decisions the director made, why he/she made them, and how they have affected the film.
Consider how some of these things help to reinforce the plot: Blocking / Rule of Thirds / Subtext Shot types Camera Angle Camera Distance Camera Movement Sound--foreground, background, synchronous, asynchronous, ambient, music Use of Color Types of Cuts |