Human: Generate a description of a dark passage with a shaft and a draft. Assistant: 
The passage drops sharply here, an almost vertical dip. Walls and floors converge to form a tubular shaft, the smooth surface making it difficult to resist being pulled downward by a strong draft that eddies along the passage and then subsides. The breeze -- if it is a breeze -- rises at regular intervals, accompanied by a deep, rasping sound from somewhere in the distance.