So many. Which to choose?
The episode hosted by Tony Randall had Miss Piggy turned into a statue because of an enchantment. The statue then undergoes all sorts of indignities, including Tony using her to light a match.
There was another episode (I don’t remember who hosted) where everyone (except Gonzo, of course) caught some virus and turned into a chicken.
Vincent Price singing Carole King (Winter, spring, summer or fall/all you have to do is call…)
Ma-na ma-nop (do do do-do do) (with someone that resembled Animal and these… cow-like creatures).
When the Muppets did Jabberwocky (with Rolf and Scooter). At the end, Scooter says “I tell ya, we never did anything this weird on the show before.” Then the Jabberwock (now just a floating head) says “Can I just put on my body and go home!”
Another strange one is one that I can’t really describe too well, but I’ll try. It involved two muppets; one of whom sang a song that went “Hugga-Wugga” and the other who sang “You are my sunshine…” Whenever the second starting singing, the first tried to blast it away. I suppose you have to see it.
Then there’s the classic bit where a frog-like muppet (not Kermit) is sitting on a fence humming to himself when a worm comes crawling along the fence. Eventually the worm bumps into the frog. The frog looks at the worm and eats him. He then goes back to his humming. Moments later another worm comes along and the scene is repeated. Finally a third worm comes along, only this time, when the frog bends down to eat it, he has to pull it. He pulls and pulls and pulls and eventually it is revealed that the “worm” is actually attached to the nose of this mega-muppet which eats the frog.
One of my favorite (non-funny) moments was when the show could not go on. The next act had some problem (I think one part of the act ate the other) and there was no replacement. Kermit went out on the stage and told the audience that the next act was cancelled. He started singing a song (I think it was “Together”) and all the muppets came along and started singing together with him.
Grok, wasn’t it Buddy Rich who did the drum duel with animal?
Lastly, since puddleglum brought up Sam, I have one more. Sam started telling the story of the Ant and the Grasshopper. All was going along fine until he got to the final page, where he was surprised to find that someone stepped on the ant and the grasshopper drove south for the winter in his expensive car.
There are so many more. Now I’ve got to go home and watch my tapes.
Zev Steinhardt