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The term "M4" is believed to have originated from the title of a 1986 film, "M4: The Rage of Vengeance," a martial arts action film starring Brian Thompson. However, the genre itself predates this film. The early 1980s saw a surge in popularity of martial arts films, led by stars like Bruce Lee and Jackie Chan. As these films gained global attention, filmmakers began experimenting with more extreme and intense action sequences, laying the groundwork for the M4 genre.