For the past several days, there's been a patch of broken glass toward the edge of the street that runs past my hotel. For several days, I've only spotted it just as I was about to step into some of the more ground-in shards toward the edge of the sunburst explosion--there's still a pretty big, intact piece of glass at its center--and changed course to give it a wide berth. On the first and second day, I wondered what had happened. By the third, it had become part of the scenery. Today, as I walked to the bank, I noticed that someone had spraypainted a black oval around it, delineating its edges. Why? Why has this been done? Why did someone bother to mark this mess? Why hasn't it just been cleaned up?