Jim Henson between shots on his short, award-winning film "Time Piece" (1965) [MORE]
(media.piefed.social)
Oh... okay. I gotcha.
Yeah, Henson was on like S1-2 of SNL before they let him go. (around ~1975)
He wasn't doing Muppets characters (like Kermit or Piggy) on SNL, but I can understand things not working out.
In fact, when you study the history of SNL, it's pretty much a long list of sensitive, creative weirdos all trying to top each other, in a shark-tank setting.