Relativity

 I glide along tree-lined trails on my skis.  Forest details whiz by.  Descending a sunlit hill, I hit crystal ice.  Losing control, down I go, hard --  wham -- arms and legs splayed in all directions. 

 Next day, I nurse my injuries on snowshoes.  Plodding off-trail at meditative speed, I notice small animal tracks crossing my way.         

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