The document discusses how horror films have changed over time, with older films focusing more on building suspense through music and themes, while newer films rely more heavily on gore and special effects. Specifically, it notes that modern horror films are more graphic, incorporate more science fiction elements, and are less reliant on suspense. Japanese horror films often retain conventions of older films, but American remakes sometimes fail to replicate these techniques. The document also briefly lists some things commonly found scary in horror films, like clowns, the unknown, realism, and corrupted innocence.