During the musical skyscraper construction scene,
A man is crawling at the bottom of the screen until the next shot is a closer one with Dinah.
During the musical skyscraper construction scene,Dinah appears to step off a high girder. Dinah realizes this,says "oops" and steps back on the imaginary girder.
Janis. Paige kept slipping on the water soaked studio floor during the 'Singing in the Rain ' number.