程小東
During the 1970s and 1980s, Bruce Lee, Sonny Chiba, Jackie Chan and Sammo Hung became famous for both choreographing and acting in martial arts action films, and were influential in the development of stage combat on film. Hong Kong-based fight choreographer Yuen Woo-ping is known for his work on "Crouching Tiger, Hidden Dragon" and the "Matrix" trilogy, in which the often unrealistic fighting techniques are complemented by directorial techniques such as bullet time. Ching Siu-tung is particularly noted in the field of Hong Kong action cinema for his use of graceful wire fu techniques. By contrast, films such as "The Duellists", fight directed by William Hobbs, "Once Were Warriors", fight directed by Robert Bruce and "Troy" &amp; Ironclad, fight directed by Richard Ryan are widely famed for including gritty, realistic combat scenes. Ryan is also known for his creativity in devising styles such as Batman's in "The Dark Knight", Sherlock Holmes 'prevision' style in Guy Ritchie's two "Sherlock Holmes" movies.