Conventions of Horror

Usually happens at night, most of the movie is at night or in the dark; Storms show up at some point in the movie; There is always a character who is or seems slightly insane/manic; Death is involved, most of the time it is murder; In movies , there is usually chilling or suspenseful music that occurs when the villain is shown; The main character does not always die but they do go through a horrifying and life changing experience, most of the time people close to them die; Horror movies and books have elements taken from real life people and/or experiences put into them, such as the villain being based off of some type of serial killer; Physical appearance of the villain is usually grotesque; Animals react to the villain or some sort of creepy figure