It's like I was saying about someone coming along and tying up all of the loose ends. Stravinsky did that. Petrouchka' are all amazing compositions. The musical directors of film scores can keep writing film scores for the next fifty years on the data they acquired from these people. Sometimes, in my own compositions, I might be in a real rage about something, maybe after a huge argument with someone, I just talk it out on the guitar.
Some people smash places, some break windows.
But a lot of times you will find things will come out of pre-aggression. I've written lots of stuff. I find that the best period for me to write is when I'm absolutely exhausted and there's nothing to interrupt the flow and direction of thought. Robert Plant and I were very choosy about the marriage of the music and the lyrics. We were very sympathetic towards each other.