Which each step Navidson takes, we too grow more and more convinced that we are really looking at a window and furthermore an open window. Doorways offer passage but windows offer vision. Here at last is a chance to behold something beyond the interminable pattern of wall, room, and door; a chance o reach a place of perspective and perhaps make sense of the whole. [...]

But when he turns around to go back, he discovers that the window is gone along with the entire room. All that remains is the ashblack slab upon which he is standing, now apparently supported by nothing: darkness below, above, and of course darkness beyond.