Sometimes we just get lucky. When I lst got on this ferry I noticed this guy with the red hat, started stalking him and getting some shots of him while he wasn't aware. Then I was setting up this shot and he turned the corner.
Great impact for me. Strong geometry and composition, and then not only do you get the sliver of man, you have the light right above him. I agree with Steve that this shot allows us to imagine many stories, and what a gift that is.