A plasmodial slime mold was rumored to be taking over certain buildings in New York City. I have obviously been reading too much Organismal Biology, but, anyway, a plasmodial slime mold is usually a very small grouping of protists that lives under the bark of trees. In my dream, it was a huge orangey-green glob of slime that looked very much like the title character from the movie The Blob.
All of the people who worked in the office building had been warned about the slime mold, but only a few of them took it seriously. Most of them continued to come to work, not believing that the slime mold was on its way. I'm not sure what my role in the dream was: I seemed to be some sort of omnipotent observer. I was able to see where exactly the slime mold was at all times, and I knew where it would be in the future. It broke into little pieces that were pathogenic that stuck only to the strings of tennis rackets. Then the bits of slime would infect the tennis rackets' owners.
But the main slime mold was still working its way to the office building. And somewhere along the way, the whole dream became animated Matt Groening-style. Smithers worked in the office building in questions, and he was one of the first people squashed by the slime mold. People were screaming and running into the streets, but looking on wasn't scary or disturbing. I felt as though I was watching a Simpsons episode that was satirizing B-movies.