I like this composition except for the little bit of wall on the extreme lower left. Its small enough not to be important ot the photo, but large enogh to be distracting. Have you tried to crop it out? That might move this photo up one full point from me. I do think the black and white are most appropriate, and the sky adds a degree of interest. Nice job overall.
A stunnin b&w picture. I love the detail and the contrast. The composition looks good, not too tight. Your person is hidden very well, perhaps you shouldn't have given the hint in your title, even though it sounds good. You deserve a 10.