great title. I like to think you're punning in both time and space.
for one, you're playing with the way photos freeze time, and therefore you have created an unmoving faller. secondly, you have framed the shot so that down the stairs is also down the 2-dimensional photo.
Most of my resistance to this photo is stylistic, which is very superficial, so I will overcome my resistance and give you this:
I love the lighting, composition and green of her dress against those lovely subdued tones of the rest of the image, it works really well. With a title such as you have chosen, however, I would expect her to be in a very different position to this, she looks more like she has chosen to sleep there. A very high score, you should do well with this
Beautiful light and the green looks so good with the earthy brown. I bet laying in the stairs like that was not comfortable, but the model looks very relaxed (except for her left hand). Gorgeous!