The Swing Line?

To my surprise I spotted a swing under the metro rail. I doesn't belong there, there's no playground or anything children related. Somebody must have thought it's a practical joke to see how people react to this unexpected playtoy in an unexpected environment.

I thought it was a nice picture so I took a shot. When I wanted to cycle away I suddenly saw grown up men, women & kids give it a try, so I went back and asked if I could shoot them.

I'd wanted to portray the grown ups, but they were too shy, but this teen boy wasn't!! Color version here.