Human: Produce a detailed written description of a eerie scene inside a tunnel passage with a slick floor and a strong stench. Assistant: 
The surfaces of the tunnel are smooth and glassy as if covered in ice, yet the air is warm and damp. Although the floor is a little slick, a cautious traveler can easily make his way up or down the gentle slope. A strong stench permeates the air, particularly near the lower end of the passage.