A parody film or spoof film is a subgenre of comedy film that lampoons other film genres or films as pastiches, works created by imitation of the style of many different films reassembled together. Although the subgenre is often overlooked by critics, parody films are commonly profitable at the box office. Parody is related to satire, except that "parody is more often a representation of appreciation, while a satire is more often...pointing ...out the major flaws of an object through ridicule." J.M. Maher notes that the "difference is not always clear" and points out that "some films employ both techniques". Parody is found in a range of art and culture, including literature, music, theater, television, animation, and gaming.
Many works of fiction have featured UFOs. In most cases, as the fictional story progresses, the Earth is being invaded by hostile alien forces from outer space, usually from Mars, as depicted in early science fiction, or the people are being destroyed by alien forces, as depicted in the film Independence Day. Some fictional UFO encounters may be based on real UFO reports, such as Night Skies. Night Skies is based on the 1997 Phoenix UFO Incident.
The vigilante film is a film genre in which the protagonist or protagonists engage in vigilante behavior, taking the law into their own hands. Vigilante films are usually revenge films in which the legal system fails protagonists, leading them to become vigilantes. The vigilante film has in recent years often crossed over with the superhero genre, due to character origin stories frequently involving an injustice having been committed against them.
