Every musician wants to do something which will hold up for a long time, and I guess we did it with 'Stairway to Heaven.'

No. I usually rest in my satin-lined coffin, actually. I'm not allowed out in daylight hours.

There will be a Led Zeppelin as long as there's a Jimmy Page, John Bonham, John Paul Jones and Robert Plant. This isn't a nostalgia band playing the hits forever. If anything ever happened and somebody left - which I really can't see happening - I don't think we'd bother to carry on. The magic for me is as it is now.

I don't deal in technique. I deal in emotions.

I don't know whether I'll reach 40. I don't know whether I'll reach 35. I can't be sure about that. I am bloody serious. I am very, very serious. I didn't think I'd make 30.

I'm obsessed - not just interested, obsessed - with folk music, street music, the parallels between a country's street music and its so-called classical and intellectual music, the way certain scales have travelled right across the globe. All this ethnological and musical interaction fascinates me. Have you heard any trance music? That's the thing.

Actually, I'm getting one made up with eight necks and I'm going to get a wheelwright to make a big rim around it and then I can do cartwheels off the stage.