Oswald the Lucky Rabbit Mouse cartoon to be filmed was "Plane Crazy" in the summer of 1928, but it was produced as a silent and held back from release. The first Mickey Mouse film with a synchronized soundtrack, "Steamboat Willie", reached the screen that fall and became a major hit, eclipsing Oswald. "Plane Crazy" was later given its own synchronized soundtrack and released on March 17, 1929. Mintz, meanwhile, opened his own studio consisting primarily of former Disney employees, where he continued to produce Oswald cartoons, among them the first Oswald with sound, "Hen Fruit" (1929). While things were going in Mintz's favor, animators
Oswald the Lucky Rabbit "Oh, What a Knight". In regards to Oswald's personality, Disney historian David Gerstein highlights the distinct differences between Mickey and Oswald as thus: In order to make his Oswald cartoons look "real", Disney turned away from the styles of Felix the Cat, Koko the Clown and Krazy Kat and began emulating the camera angles, effects and editing of live-action films. To learn how to base gags on personality and how to build comic routines, rather than heaping one gag after another, he studied Laurel and Hardy, Harold Lloyd, Charlie Chaplin and Buster Keaton. In order to stir emotion in an