We kept moving forward and didn't try to recreate the past .. the approach to each album was radically different every time. Many bands would have some success and, because they were locked into having a single - something we didn't have to worry about - they had to make sure there was something similar on the next album ... that was never the idea with Led Zeppelin .. the goal was to keep that spark of spontaneity at all times.

From the classical guitar right through to the furthest electrical experiments and everything in-between, it's amazing what the guitar can actually do. I mean, when one thinks about sounds.

I always felt if we were going in to do an album, there should already be a lot of structure already made up so we could get on with that and see what else happened.

I'm still terrified of flying. I really have to get drunk to fly. I've found that I've developed fears I never had before... fears of heights, claustrophobia... only in cities, though, never in the country.

Almost the moment he died, they put him in Playboy as one of the greatest drummers, which he was - there's no doubt about it. There's never been anybody since. He's one of the greatest drummers that ever lived.

I played guitar all my life, all the way through the Yardbirds, but I knew that for me this was going to be a guitar vehicle, because that's what I wanted it to be.

I can only listen to what I'm working on, at the time. I can't listen to anything else because I don't want to copy it.