Andrew Sanders jerked awake. What had woke him? Ah! There it is again! That insistent tapping. Now it had turned to hammering. He turned to see if Leigha had woken up, but she was still dreaming peacefully. He got up to look around, contemplating going upstairs to tell his neighbors to shut the hell up. He opened his door to run up the carpeted stairwell when he looked up. The stairs went nowhere.