Currently, action films requiring extensive stunt work and special effects tend to be expensive. As such, they are regarded as mostly a large-studio genre in Hollywood, although this is not the case in Hong Kong action cinema, where action films are often modern variations of martial arts films. Because of their roots and lower budgets, Hong Kong action films typically center on physical acrobatics, martial arts fight scenes, stylized gun-play, and dangerous stunt work performed by leading stunt actors. On the other hand, American action films typically feature big explosions, car chases, stunt doubles and CGI special effects.
Hong Kong action cinema was at its peak from the 1970s to 1990s, when its action movies were experimenting with and popularizing various new techniques that would eventually be adopted by Hollywood action movies. This began in the early 1970s with the martial arts movies of Bruce Lee, which led to a wave of Bruceploitation movies that eventually gave way to the comedy kung fu films of Jackie Chan by the end of the decade. During the 1980s, Hong Kong action cinema re-invented itself with various new movies. These included the modern martial arts action movies featuring physical acrobatics and dangerous stunt work of Jackie Chan and his stunt team, as well as Sammo Hung and Yuen Biao; the wire fu and wuxia films of Tsui Hark, Yuen Woo-Ping, Jet Li and Donnie Yen; the gun fu, heroic bloodshed and Triad films of John Woo, Ringo Lam and Chow Yun-Fat; and the girls with guns films of Moon Lee and Michelle Yeoh.