I wasn't quite in the zone, but I've been there before. It is a great feeling. Something about that song just does it for me, and the weather corresponded.
I don't know much about string theory. It seems like an interesting correlation. A friend recently posted an article about how most people don't get goosebumps from listening to music, about how that is a rare phenomenon. That really surprises me. For me, walking around or riding with headphones on is transformational. Maybe that has to do with experimenting with things in my youth, though;)