Phyllis - That's my favorite step as well and one of my all-time favorite steps, period. When the number gets to "Jingle bells! Jingle bells!", I get goosebumps (when executed well). But I also love that step-kick criss-cross figure eight (with the full cast) that instantly transforms into the three lines leading into the insanely frenzied "you-hoo-hoo"s (not just the arms circles, but the crazy stuff the ensemble does in the background) and the return of the headache-inducing (I tried it myself) aforementioned favorite step-touch step-back-kick flail-the-arms-and-bang-your-head step. And as much credit is given to Fosse for the Single Ladies video, there are hints of Michael Bennett and his fondness for some of his complicated pat-the-head/rub-the-belly/walk-and-chew-gum frenetically layered choreography.
I have to say this number is probably the most exciting piece of choreography I've ever seen in musical theatre and it is such a ridiculous and pointless song! The lyrics are nonsense and the number adds nothing to the plot. But it is unbridled energy and joy that never fails to make me giddy.
I also love how he passes off the cup at the beginning.
"What can you expect from a bunch of seitan worshippers?" - Reginald Tresilian