If I should mention one thing, it's the force between two objects. It was very thoughtful timing on your part, considering where something occurs and objects are positioned. However, the hand for instance is misleading, but interesting.
It's one of those spontaneous things that you don't catch until the moment is long gone. It may not help the photo, but it's what was there, so there it is.
Absolutely amazing shot! Only thing that bothers me slightly is the hand coming out behind the wall next to his head. Looks great as black and white, good choice!
Was looking at this photo again and saw my comment down here... and I'm not really sure why I commented on the hand, as it isn't something easily avoidable anyway, haha. Still love this photo!