I've heard there is a Feetface-era Noggin sign off and I've heard it's kinda funny. In the sign off, it's basically where Feetface says "Okay. Let's sing one more time." and then, after singing the "-Ing" song some more, he gets tired, as he saying "See you tomorrow. Good night." and goes to sleep. After that, the kids in the background start laughing and The N signs on.