I thought perhaps you may be shooting from the hip in this photo. But then, I would expect this to be the normal view of a passenger in a crowded subway car. There's no eye contact, you're either looking up or looking down, much like in an elevator. At least, that's how I see it.
I was so taken with the positioning of the legs and feet that I overlooked the significance of what Tami points out here, Jen. No doubt you were mirroring your feelings on that train when you made this image of those arms and hands. Tami's observation adds even more meaning to this photograph for all of us.
In this picture, I can't see past the 3 people in the middle. The way the clasp their belonging to their bodies shows their insecurity to me. Something we all have. By cutting off their faces you show how anyone can suffer from it regardless of their looks, age or social status.
And still another way of telling this story, a true measure of your imagination and versatility as a story-teller. By taking off their heads, and concentrating on their feet, you speak here of non-communication. We don't talk to strangers, do we? We stare straight ahead, afraid to even look at someone else. By removing the heads, and instead stressing the awkward positioning of the legs, you make this point even more strikingly.