However, this did not stop guests, mostly children, from destroying the piece. I have seen this time and time again. Usually ...

The first, 1974's The Muppets Valentine Show, starred not Kermit the Frog, but a legitimately forgotten character named Wally, performed by Henson. Here he is in a scene with guest Mia Farrow.

adopting the then-popular format of variety shows for the Muppet players. A human guest star would join the Muppets for sketches, songs and backstage comedy bits on a carefully controlled set.