kresh could hear donald behind him , moving in close to protect kresh against whatever imaginary danger the robot might choose to worry about : the wall giving way , an impossible gust of wind blowing in some inconceivable direction and sucking kresh up into the air before throwing him clear of the edge of the building , kresh suddenly giving way to some long-hidden-and completely imaginary-urge to self-destruction and deciding to fling himself over the edge .