"Kung Pow: Enter the Fist" is a movie within a movie, created to spoof the martial-arts genre. Writer/director Steve Oedekerk uses contemporary characters and splices them into a 1970s kung-fu film, weaving the new and old together. As the main character, The Chosen One, Oedekerk sets off to avenge his parents' deaths at the hands of kung-fu legend Master Pain. Along the way, he encounters some strange characters, one of which is a cow trained in the martial arts.—kem