Most of the time we don't notice it, but screenplays consist of much more structure and symbolism than is commonly assumed. And that is right, because they should be designed for maximum impact.
Take the role of water. At the stage of the Near Death Experience, romantic lovers part in the rain (50 First Dates, 2004), protagonists are captured and tortured with water (Green Mile, 1999), protagonists happen to be on vessels that sink (War of the Worlds, 2005) and heroes are submerged by antagonisms (Jaws, 1977).
The role of water is ancient and works on the audience subconsciously; it signifies baptism / dirt to cleanliness / washing away the Old and emerging to the New Self.
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