he threw it off with an effort and bolted toward the bedroom door , wanting to lock it before the thing could get in here , but he slipped in a puddle of soapy water and this time he did go down , flat on his back on the oak planks , and what he saw as the door clicked open and the motorcycle boots crossed the room toward where he lay , naked and with his hair full of prell , was the picture hanging on the wall over his bed , the picture of the road virus idling in front of his house with the driver 's side door open .