Mary is an ecologist, and she recently received information about another fact of environmental pollution. She went there to take samples and do chemical tests. In front of her was a puddle of jelly-like acid-green liquid. There was a pipe nearby, apparently this green slime flowed out of it. She started taking samples and got too close to the edge of the slime pit. Then she slipped and fell straight into the green slime. This is a very deep hole, and the green slime began to quickly suck in Mary's body. She tried to reach the pipe with her hand, but it did not help her. Mary continued to sink lower until the slime reached her ears. Finally, her head disappeared completely under the surface of that acid green slime.
The bonus video contains footage that was not included in the main video, where Mary flounders in green slime, dives and appears, then climbs out of the hole.