For the record, this scene, with Jerry, was animated by Ken Muse, Ed Barge, and Ray Patterson. (By now I think all of you can tell them apart.)
It might be me, but I can't fall for the supposed 'magic' of this scene. While I love the fact that something as 'off-model' as Ray Patterson's great animation made it through to one of MGM's big budget musicals (which could only be topped if Irv Spence's animation made it in), the fact that Jerry is imitating Gene Kelly's every move kills off a lot of the character's believablity that made those Tom & Jerry cartoons of the mid-40s so great.
I still like it more than the Esther Williams scene.
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