Gene Kelly performs the Alter Ego dance in the 1944 film “Cover Girl.” Famed director Stanley Donen recounting his historic contribution to the sequence: ❝The director of the film said it’s impossible, it can’t be done. And Harry Cohn (head of Columbia Pictures) said to Gene, “Think the kid Stanley knows what he’s talking about?” Gene said, “Yes.” There was no such thing as a computer in those days, it hadn’t been invented, and we had to actually duplicate exactly the camera moves, how fast, how