Then they wake up, and the ballet was All Just a Dream. The Dream Ballet had its heyday in musical Theatre from the 1930s through 1950s, when it was a favorite of such choreographers as George Balanchine, Agnes de Mille, Jerome Robbins and Bob Fosse. It appeared in other media as well, but has now fallen out of fashion. It doesn't necessarily have to be a dream, but it only takes place in a character's mind. Compare All Just a Dream and Disney Acid Sequence. Examples of Dream Ballet include: