Good shout calling him out on the drums thing! That's a bold question, a little dangerous, I certainly wouldn't have had the bottle - but it was a question people have been silently asking for a while, an interesting answer, a fair answer, and the interview's better for it. It's those sort of questions that make an interview more interesting than the traditional PR exercise, and being able to ask them in a non-confrontational way that doesn't intimidate the interviewee is probably the mark of a great interviewer.
Great stuff! Continuing, now, just wanted to write that while I was thinking it.