On an aperance of the Today show (last year I think) it was a bloopers disaster. One of them featured Gonzo, somehow his eye mechanism wasn't working and one of his eyelids was scewed! Not missing a beat, Dave Golez attempted fixing it with Gonzo's own hand, and added, "The perils of live televison!" Second, Twice, you can see Dave's Hand pulling Gonzo's arm rods. Thirdly, Kermit was talking about the new Muppet Movie Releases to DVD, he announced The Muppet Movie, but instead they showed GMC, Steve also corrected this asap.
I've noticed on Between the Lions (not a Muppet Blooper, but still interresting) on I think a bird song (sung by Information Hen), the large "book" type object is open, and someone was probably rehearsing opening and closing it, so for a few seconds, it opens and closes by itself!
There are some other Muppet Bloopers talked about in Of Muppets and Men, I'll post some when I get a chance!
Your friend, Dr. Footh.....that's not right.....