The taste in musicals revived again in 1933 when director Busby Berkeley began to enhance the traditional dance number with ideas drawn from the drill precision he had experienced as a soldier during World War I. In films such as "42nd Street" and "Gold Diggers of 1933" (1933), Berkeley choreographed a number of films in his unique style. Berkeley's numbers typically begin on a stage but gradually transcend the limitations of theatrical space: his ingenious routines, involving human bodies forming patterns like a kaleidoscope, could never fit onto a real stage and the intended perspective is viewing from straight above.