Sid [the character from 'Ice Age'] is a prehistoric sloth. Sloths move really slowly and they store food in the cheek pouches. That's where I got the voice that you hear. He had to sound as though he was storing food.

I really love it, I love working with directors that are very collaborative and allow me input. I've done over 75 films, it's just like you're an apprentice. You learn so much about camerawork, lenses, and I'm always talking about DPs and directors and they always give me lists. I think pretty soon, I'll be ready to move away from being in front of the camera.

It's all about respect; he's looking for respect from his buddies. In the last one he just wanted to hang out, to be part of the group, but this time he wants more from his friends. And without giving the story away, he finally gets something that he has been looking for when the mini sloths kidnap him and take him to their tribal area. He gets to be the Fire King and they worship him and there is an amazing scene with a "call and response" sequence in the style of Cab Callow [the legendary American jazz singer and band leader] between him and his audience.

I did an HBO movie called Undefeated that I directed. It was too hard.

The message is one of the beautiful things about the film. And I think part of the appeal is simply that they are prehistoric creatures, they are no longer around and that makes them magical and makes us feel quite emotional, because we know that those creatures did not survive in the long run, so there's poignancy in their fight for survival.

Most of the great directors I've worked with - De Palma, Spike Lee - like rehearsals.

My parents were incredibly strict, almost military style.