The first Chase series was successful and expanded to two reels (20 minutes); this would become the standard length for Chase comedies, apart from a few three-reel featurettes later. Direction of the Chase series was taken over by Leo McCarey, who in collaboration with Chase formed the comic style of the series—an emphasis on characterization and farce instead of knockabout slapstick. Some of Chase's starring shorts of the 1920s, particularly "Mighty Like a Moose", "Crazy Like a Fox", "Fluttering Hearts", and "Limousine Love", are often considered to be among the finest in silent comedy. Chase remained the guiding hand behind the films, assisting anonymously with the directing, writing, and editing.