I'm sometimes unaware of my own surroundings, so there have been times when I walked toward a pole or bumped my head on a low-hanging beam. And since I'm also a bit clumsy, I sometimes hurt myself when I drop things or when close the drawers and closets.
But there are several surprising ways that one who's over 40 can injure themselves. McSweeneys lists them here.
(Image credit: Jesper Aggergaard/Unsplash)