I know that you said that you didn't perform in the on-location shots of Follow That Bird, but Can you tell us how available Jim Henson, Frank Oz, Jerry Nelson, and Richard Hunt were on the set for the days and locations that you did perform at? I've noticed that Ernie didn't talk much in the street sceens, and I've read some speculation about Jerry Nelson looping The Count's voice in many scenes.
Also, it's interesting that you performed Biff in the opening scene. I never saw Biff there, and I pay attention to who all is in the background alot. There are only a few cases in Henson productions where I can't tell who all is in a crowd scene (scenes like the finale for The Muppet Movie and the wedding for The Muppets Take Manhattan, for example). And the street wasn't too crowded with Muppets in that scene. I thouhgt that Biff's only scene was when Maria was reading the letter from Big Bird (I know that Sully also appeared right before The Count counted cars that were going after Big Bird).
Then again, there are a few street scenes in Follow That Bird where I have trouble seeing who certain characters are (mainly ones in windows that are very far away), but not many. Of course, you're scene with Biff could have been cut/ shortened from the film, or maybe Biff can only be seen there in the widescreen version of the film.