I saw that "Classic Sesame Street" has a thread called "Little Things We've Noticed." Well, how about one for "Classic Muppets"? Here's one for a starter: the UK bit on the Carol Channing episode of the Muppet Show. Floyd, on guitar, and Beauregard, on harmonica, play "Wave" for some penguins. Partway through the number, Beau's harmonica seems to have grown to twice its former length!