The Rules Of Horror Films

This clip is a perfect example of "The Rules Of Horror Films" many horror films do follow these rules as well as scream the film Friday the 13th is a good example of this when Trent cheats on his girlfriend and sleeps with Bree later on these two characters are murdered by Jason.
The general link in horror films are if you do something bad you are more than likely going to be killed or you do a 'deed' or wrong doing which then triggers a chain of unfortunate events. An example of this would be in Scream when you find out that Billy is the killer and then Sidney kills him.