And one of the funnest things was watching what they did before the director called action and after the director called cut. And they'd keep their hands in the puppets, they'd stay in character, and then they'd start goofing around with each other and be off of script, and it would get quite blue.

In many ways, I think it's easier in some ways, or it's more entertaining or more guaranteed to be entertaining than traditional improvising. Again, because you're not just you in your body.

And with puppets, especially in our company, we sort of demand a very high standard of puppetry, so it's a real technical skill.

And then while she's lip-syncing, "I've Grown Accustomed To Your Face," to this little head next to her, the head eats the cloth fabric and swallows it and it's sort of this weird, demonic character there, who then tries to eat the singer. But it's a lot of fun. So there's a couple of pieces like that.

And my dad's answer would be usually something to the affect of, A, it came out better than he imagined, but also, he said, "No, it would be impossible for me to imagine the way it will come out." He said, "Yes, I story-boarded it, I had a plan, but then I work with an army of great artists and I want all of them to create inside that creation."

The first big thing that I did with my dad was the bicycle sequence in "The Great Muppet Caper," where Kermit and Piggy are riding bicycles in Battersea Park in London and that was a complex marionetting and cranes driving through the park, it was a complicated scene, and I did that with my dad.

A puppet that starts to improvise badly is almost funnier than the puppet that's improvising well. So the show gets better when the improvising is really good, but also the show can also sometimes get better when the improvising sort of goes a little wrong and that's sort of a blessing to improvising with puppets.