A busker is usually always keen to be photographed (just make sure you add a few more coins to the donation) and thank them.

While this guitar playing person is the focus of the picture, the lights of the subway walls draw the eye to the end - leaving one wondering what lies beyond. Well, at least it does in my mind...

This photo was over with in a matter of seconds. I saw him in the subway tunnel, raised my camera, grinned, he nodded  "yes" (or at least, I think that's what he meant), I took the photo, emptied the coins of my wallet into his guitar-case as I said "thank you", then carried on walking.

Perhaps it was rude not to stop and enjoy his music for a bit...