Last night I dreamt of seeing a rather interesting appearance by the Muppets on a TV special from somewhere between 1977-78. I can't remember much of this special except that it had nearly every Muppet from both Sesame Street and The Muppet Show on there, and there was some female singer. The scene, set backstage in a theater (not the Muppet Theater), was a musical number that was a salute to some of the greatest musicals, and one by one, a Muppet would come in to assist said singer, but of course this being the Muppets, chaos and silliness were bound to erupt at any and every moment.
The Muppets I remembered seeing are as follows:
Big Bird
Ernie (playing a piano) and Bert (playing a ukulele)
Kermit
Mean Mama
Grover
Sweetums
The Count
Some Anything Muppet kids
Rowlf and assorted Muppet dogs
Cookie Monster, Luncheon Counter Monster, Herry, Frazzle, the green/yellow beaked monster (SS), Harvey Monster, Grey Monster (SS), and Harvey Monster all running amok; LCM nibbling on a piece of film reel, some explosions here and there, munching cookie noises, etc.
Beaker entangled by Snerfs
Guy Smiley
Swedish Chef dancing in Carmen Miranda wardrobe with bananas
Animal chasing a crocodile, and later on, being chased by the crocodile. Floyd, Zoot and Janice looking on in confusion.
The birds from the "For the Birds" sketch
Fozzie dancing in a hat and cane and Scooter telling him to watch out for the banana peel, which Fozzie slips on.
Male Whatnot Mexican hat dancers dancing to "America" from West Side Story and crashing into scenery
Camera then pans to a huge prop garbage can (with a lid like the one you'd see on trashcans in Britain) in which Oscar, wearing a viking helmet, emerges out of, attempting to sing an opera. But then Oscar forgets his lines and screws up, and goes back inside the can.
A few seconds later, Gorgon Heap slowly rises up from behind the trashcan, wearing a bowtie, and sings a (very) long note causing him to lose his breath that he faints, dropping his head on top of the lid in exhaustion. He then tells everyone to "cue the next number" and collapses onto the floor.
Then it cuts to Kermit and Piggy in the mountains, a la "The Sound of Music"
...at which point I awoke in reality and snapped out of my dream. All I can say is that it was kind of neat seeing this.