Horror films have existed since the silent movie era, gaining widespread popularity in the late 1970s and 1980s with films like Nightmare on Elm Street. While the genre declined in the late 1980s and 1990s, the 1996 film Scream revived interest in horror. Common conventions of horror films include blood, death, monsters, isolated settings, weapons, and darkness. Camera techniques such as Dutch angles and extreme close-ups are often used to create disorientation or emphasize frightening elements.