I have just the shot for this one. It was about 4 years ago in NYC. I love the subways and the way you can witness all those different characters. One of the things i love about it also is the way you can see the people in the other side of the station through the windows of the trains. It looks almost like they were ghosts or very short moments never to happen again. Maybe it’s the speed of the cars that gives me this sensation. Maybe is the fact that those framings will never happen again. But then again everything in photography and in life doesn’t happen again… 🙂