he looked down into the river and immediately he let out a loud and raucous laugh , a boisterous , hearty old hoot that resounded all along the river and through the valley in which yami found itself situated ; it bounded and bounced inward through canyons and it reached the edge of a forest , far away , and then echoed into a cave where it roused a hibernating bear , who jumped up at a start , realizing that he had overslept by many months and , in doing so , had missed all of spring , and who hurried out to greet the long-proliferating nature in the forest outside , remembering again the purest joy of living .