I'm guessing most of you have seen this, but if you haven't, it's a video with Jim Henson, Frank Oz, and Michael Frith talking about the core characters, both in their personality and in the puppet designs. One thing I found interesting is that when Frank Oz is talking about Animal, he mentions that Animal likes Zoot and calls him "Zat". He goes into his Animal voice and says "Hi Zat" to demonstrate. I don't recall that ever being on screen anywhere. Is there a point in time when Animal actually called Zoot "Zat"? I normally wouldn't put much weight behind the claim, but it's different when it comes straight from Frank Oz's mouth.