Every day on the walk home I encounter the same piece of dog poop. It's in the middle of the sidewalk. After weeks of sitting there it doesn't even look like poop anymore, just a clump of dirt that the flies abandon when I get too close. I forget that it's there every time, and every time I see it I almost step on it and every time I think Whew, that was close.
It reminds me of work somehow.