It's wonderful, if a little odd, to think of the NYC subway as a plucked guitar, versus the familiar steel-on-steel "ka-chunk, ka-chunk" as the trains rumble on

It's wonderful, if a little odd, to think of the NYC subway as a plucked guitar, versus the familiar steel-on-steel "ka-chunk, ka-chunk" as the trains rumble on the (unwelded) tracks.