You get used to it, you look forward to the adrenaline of the stage fright before you go out.

Probably though, by the time I was 17, I already knew that I was probably going to go into film

I was 17, certainly by the time I was 19, I knew that show business was where I was going to end up, and I had my sights on being a director.

First of all, you're improvising through a puppet, so you're not always yourself: you're a cow or you're a pig or you're an old woman, you know, whatever puppet you pick, or you're a demon, you know, whatever you pick up, that's what you get to be in the scene.

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.

This is certainly the raunchiest, if you use that word, raunchy. The roots of Jim Henson, though, was adult comedy.

It's actually good when the performers are nervous, because it kind of sharpens up your brain and a little bit of adrenaline is good. Initially it's really tough.