The Secrets of
"Mr. Hankey's Christmas Classics"

The mailman is derived from "Special Delivery Kluger," the mailman in Rankin-Bass's Santa Claus is Coming to Town (1970), who is modeled on and voiced by Fred Astaire, one of the best dancers in movie history.

Some have commented on what look like stigmata on Mailman Timmy's hands. They are not stigmata. They are O's made in the usual fashion: thumb tips touching the other finger tips. Sometimes he has them turned in, sometimes he has them turned out.

"Fight the Frizzies" - The anchorman (Tom Vogt) was teasing a news story that would detail how to keep your hair from forming "split ends" during the winter months, or at least how to manage frizzy hair. In 1978, commercials for Agree shampoo popularized the practice of calling split ends "frizzies" (and Agree shampoo would help fight the "frizzies"). The anchorman ended up fighting a person with extremely frizzy hair. It was part of The Star Wars Holiday Special, which aired only once, on November 17, 1978. The special covers Chewbacca's return home to his father Itchy, wife Mala, and son Lumpy. An 11-minute animated segment introduced Boba Fett before Episode V hit the theaters. George Lucas regrets the day this special aired, and wishes that all copies of this special be destroyed.

Hellville - a spoof on Wellville, the complex that Dr. Kellogg created to pursue his love of health. In it he tried all kinds of things to improve America's health.

You can take "Christmastime In Hell" and "Santa Claus Is Coming To Town" and make a medley of them. In fact, the transition is so smooth the stanza writes itself:
You'd better watch out, you'd better not cry,
You'd better not pout! I'm telling you why:
Santa Claus is coming to town
'Cause it's Christmastime in Hell!

Cartman takes one of the two stars above the middle hump on the back of the sofa, but the one shown missing soon after is the one to the left.

Amazing! Even as a baby, Jesus had a mustache and beard.

The pianist is Marc Shaiman, who also appeared in South Park: Bigger, Longer, & Uncut.

The songs Santa tries to sing when Jesus is on a roll:
"Jolly Old Saint Nicholas"
"Santa Claus Is Coming To Town"
There's one other...

One of the poo markings on the bathroom wall is actually a human head with an arm or two tied behind it.