I heard an interview with him on Fresh Air (NPR) where he discussed how, as a child, he liked to watch things spin and his ongoing obsession with the introduction to Soul Train. You can get the gist of it here:
http://m.npr.org/news/Books/190420270
NPR often has transcripts of these things, but I can't find it easily via google. Maybe somebody else can?
He also has a new book out, and I would guess he talks about it more there, too.