Indeed, Faldage! Let me change that point to: Of the eight pillars that join the two storeys together, only the extreme right and the extreme left behave normally, though they are not supposed to, considering the different dimensional perspectives of both storeys. Assuming the man on the bottom storey is looking eastward, the floor of this storey is in an east-west direction. The pillars of this storey are however aligned deceptively in the north-south axis, akin to the direction of the woman's gaze (the one on the top storey) and hence, the effect of alignment between all pillars.
Edit: all pillars - changed to - the extreme right and left one.
if i continue anymore in this vein, this will convert into an Eschersque post. Ahem...