It is from the Washington Post Style Invitational contest that asked readers to submit "instructions" for something, written in the style of a famous person. The winning entry was The Hokey Pokey (as written by William Shakespeare).
O proud left foot, that ventures quick withinThis was apparently discovered by Jeff Brechlin, Maryland, and submitted by Katherine St. John.
Then soon upon a backward journey lithe.
Anon, once more the gesture, then begin:
Command sinistral pedestal to writhe.
Commence thou then the fervid Hokey-Poke,
A mad gyration, hips in wanton swirl.
To spin! A wilde release from Heavens yoke.
Blessed dervish! Surely canst go, girl.
The Hoke, the poke -- banish now thy doubt
Verily, I say, 'tis what it's all about.
-- by "William Shakespeare"