Event on Roc 'Round the .

You approach the site where your passage was blocked by the debris from the falling rocs. You spy a small group of rocs engaged in a bizarre bobbing dance. And what is that they are singing? You catch a snippet of the tune- "I get knocked DOWN but I get UP again..... Closer inspection of the debris from the falling rocs identifies it as various empty liquor bottles. You take one that looks rather unique