The post title is not a reference to the old jazz number, the recent animated-film franchise, nor even (my own immediate, favorite association with the term) the sudden exclamation in Steve Martin's classic stand-up routine.
No, I bring you, as you can see above, a pitch for The Charlie Brown School of Dance. Like good ol' Mark Evanier — on whose cornucopian blog News from Me I first saw the link — said, "Just watch it...". I hope you'll pass it on.
Paging Xander Harris!