Beginning in 1921, Roach and Lloyd moved from shorts to feature-length comedies. These included the acclaimed "Grandma's Boy", which (along with Chaplin's "The Kid") pioneered the combination of complex character development and film comedy, the highly popular "Safety Last!" (1923), which cemented Lloyd's stardom (and is the oldest film on the American Film Institute's List of 100 Most Thrilling Movies), and "Why Worry?" (1923). Although Lloyd performed many athletic stunts in his films, Harvey Parry was his stunt double for the more dangerous sequences.