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.
(Click on first thumbnail image and follow arrows.)