Loved this part in the "more information" column in Down Argentine Way:
"...Irving Cummings, director of D.A.W., intended to edit and shorten the Bros' scene, while dance director Nick Castle made a claim for including it in its entirety. A test screening was held, where the audience raised a cheer for the Bros and shouted to the operator in the projection booth to rewind the film and show their dance sequence again (the operator actually did it), which settled the argument."
And so the Nicholas Brothers laid the groundwork for video rewind. :mrgreen: