human
Write a detailed description of a eerie scene inside a tunnel sewer with a floor, vents, and tarry substance.
assistant
A black tarry substance coats the walls of the miserably horrid-smelling dead end. A thick crack in the floor, crusted with black scabrous material, releases foul emissions into the air. The vents in the wall are all very small, giving the appearance that the tunnel is covered with a huge mud dauber's nest. Jets of steam spray occasionally from the holes.