Fungal Halo

The man shouting at me imagines himself to be someone important. Though I barely pay attention to his ranting and raving, I gather that my error has not only inconvenienced him, it is but the first domino in a chain reaction that will end with his company collapsing, people losing their jobs, and the entire United States economy falling into ruin, all because I neglected the extra shot of espresso in his extra large caramel turtle mocha.