Horror movies commonly use certain conventions and themes including jump scares, darkness, mystery, and themes of good vs. evil. The characters typically include a main protagonist or victim, villain or monster, and stupid teenagers who are killed. Jump cuts are often used to build suspense and tension before providing a scare to the audience. Most horror films follow a similar plot structure where the protagonist faces a problem or barrier that grows increasingly difficult to overcome. The target audience for horror films is typically males ages 25-40 since most films receive an 18 rating requiring that age.