In one scene Stephanie and Tony ride through the park in a carriage. About once per minute the background jerks and then repeats showing that it is back projected on a loop.
In the restaurant, when Jerry and Clarisse start dancing, his right arm at her waist pins one end of her scarf to her body. In the very next shot, although his arm hasn't moved, the scarf end is flapping loosely.
As Red Skelton bows and hits his head on the piano, the camera cuts to a long shot where he hits his head again.