"David Bowie is a very good friend of mine, I get along well with him. Of course, there’s always this temperamental thing between musicians — a degree of ego clashing. It has to be like that because when you’re working with other people, you can’t have it your own way all the time. ‘Under Pressure’ session was totally spontaneous and that’s why it was so good. David and I are both people who get bored very quickly and we like to do things on the spur of the moment."