Very well done, a most appealing composition. Cool, geometrical, and technically just about perfect! Next time wait until there's a two-year old trailing her teddy bear up the stairs?
gorgeous light and geometry! very nicely done. i think the picture in the lower right is a bit distracting though....i'd PS it out if it were mine. i think it'd give it a more abstract look, and also let the viewer focus their attention on the aforementioned light and lines. well done martin!