This will help make my short film more authentic
The first genre I will look at is Action
Action films are stereotypically manly films, based around acts of heroism, explosions, car chases and extended fight scenes.
Popular films of this genre are Terminator, Rambo, Die Hard and The Bourne Ultimatum. Notable actors include, Sylvester Stallone, Arnold Schwarzenegger, Bruce Willis and Steven Segal

Comedy
Here the film is based around humour, and apart from Black Comedies, generally have a happy ending. A range of techniques are used to do this, including silent comedy (Mr Bean), slapstick or spoofing (Scary Movie series). Popular comedy films are: Monty Python, The Hangover, Superbad and Carry On series.

Adventure
Adventure Films involve intricate story lines, and sub plots involving the characters. Generally these films take place in the unknown, wilderness, and other mysterious places. Here is a list of popular adventure film concepts from wikipedia
"Popular concepts
-An outlaw fighting for justice or battling a tyrant (e.g., Robin Hood, Zorro or Star Wars)
-Suspense and dangerous situations the characters must escape from.
-Pirates (e.g., Captain Blood or Pirates of the Caribbean)
-A journey or quest of some kind, such as searching for a lost city or for hidden treasure (e.g., King Solomon's Mines or Indiana Jones)
-The Campbellian hero-myth cycle, coming of age, discovery of one's destiny (e.g., Star Wars, Dune, Lord of the Rings).
-Allegorical themes as social commentary (e.g., Planet of the Apes or Star Trek)
Adventure films sometimes contain stock characters and stereotypes. In some cases this has been accused of going as far as implicit racism; claimed examples of this are Indiana Jones and the Temple of Doom, First Blood and James Bond "kicking third-world people around" in Dr. No."

Horror
Horror films take advantage of the audiences fears and dislikes to shock and scare them. Often Horror films are mixed with fantasy and sci-fi films. Horror films normally take advantage of societies current fears, by taking a story from the news and scaling it into a terrifying film, an example of this are the films "Psycho" and "The Texas Chainsaw Massacre". Both of these landmarks are based upon the true story of Ed Gein. Here is some info from the internet;
"The character Norman Bates was inspired by Ed Gein, a Wisconsin man who was arrested in 1957 for committing two murders and digging up the corpses of countless other women who reminded him of his dead mother. He skinned the bodies to make lamp shades, socks and a "woman suit" in hopes of becoming a woman. He was found to be insane and spent the rest of his life in a mental institution.""

Social Realism
Throughout film history, British films have played an important role, and created a number of memorable films. During the 1960's with the high cost of making films in Hollywood, studios started filming in other countries, namely Britain. In Britain a new wave of film was being done, with directors creating powerful films dubbed “Social Realism”.
Social Realism has a gritty realistic working class view, depicting social and racial injustice, economic hardship, through unpolished pictures of life's struggles; often depicting working class activities as heroic
