i shut the door , locked it , and walked away shaking my head . assuming a loose , two handed grip , the big young man took a step back . spade leaned in , lowering his voice . he had no way of knowing what the distance to the floor was , on their present size-scale , but the sensation was like that he would have had if he had leaned out a window on the twentieth floor of an apartment building . `` it 's just the tip of an iceberg . 