Consider the scene in isolation from the rest of the film. You may watch the entire film if you wish, but you will be graded on the precision with which you are able to describe the sequence and the quality of your ideas about its possible meanings.
Your task, then, is twofold: 1) to describe what you see as clearly as possible (you do not need to use filmic terms); and 2) to explain what it might mean (literally, thematically and symbolically).
You should write the assignment in essay form, but should think of it as having two parts. The first part of the assignment involves a shot-by-shot breakdown of the scene. The second part asks you to provide several possible interpretations of the meaning of the scene. A topic statement is required. A thesis statement is not.