Complex sentence: The style is also featured in the movie "Lethal Weapon" (1987) Dennis Newsome a west coast expert on Jailhouse Rock, personally taught Mel Gibson who used it in the final fight scene.
Split into simpler sentences: The style is also featured in the movie "Lethal Weapon" (1987). In the film, Dennis Newsome (a west coast expert on Jailhouse Rock) personally taught Mel Gibson's character, who used it in the final fight scene.