human
Please generate a brief description of a dark scene inside of a basement with water, ceiling, blocks, and foam.
assistant
The water courses a bit more rapidly through this sunken room, thick foam mingling with the river of sludge. A thick oily substance tenuously clings to the surrounding walls and small slithering forms writhe beneath the black veil. Even the blocks that thrust from the crumbling ceiling are not spared the inky covering.