On yesterday's commute I saw a bike chain in the middle of the trail. I stopped to get it off the trail. Comparing it to my chain it was either a 9 or 10 and long enough for a bike with rear derailleur. So, I'm wondering how he/she got home. I'm guessing there aren't many who carry a spare. I also wonder why it was left on the road. Granted it was on a section that was a slight downhill. But surely no one would snap a chain, have it come completely off and not know - would they?