Its seems that when he is saying the rattle of his chains it should be Casey minds the arrows and ignores the fatal echoes of the clicking of the turnstile and the rattle of its change. Seeing that he is describing arrows for direction and the fatal echoes of the turnstile machine itself when you go through it is clicking as it changes. Another gent said it could be chains on him but i don't think you would hear them on yourself or describe them as it is done here. Just a thought but could it be that Kris just never bothered to correct it after all these years. Guess it really doesn't matter its still one of his best and hope Kris is around for a good long time yet. Cheers