The Muppet Show was just a reference to the show’s opening theme tune. Puck’s utterances had the same syllabic structure as the theme tune’s lyrics:“It’s time to put on make-up,It’s time to dress up right,It’s time to get things startedOn the Muppet Show tonight!”
I have a print of the Water Cooler illustration from early on. It’s perfect, except that it’s not signed.♥