A report details the results of a toxicity study, in which four groups of monkeys were given daily doses of a drug at levels varying from 100, 250, 500, to 10,000 mg/kg/day. Out of the highest dosage group, every monkey died that day from vomiting and renal failure except one: monkey 93990. Over the course of the next several days, the report describes how the monkeys from the next dosage groups all eventually succumbed to death after various horrifying conditions, including prolonged vomiting, diarrhea, hallucinations, weakness, and more. Through it all, monkey 93990 survives and even thrives, gaining weight and climbing his rope. He stares constantly at the cage door, and when the last monkey dies, even manages to steal the handlers’ poking stick. He also adopts a behavior of “imploring”, or begging, at the handlers. His survival is so novel that the scientists decide to inject him with a 100,000 mg/kg dosage, which also seemingly has little effect on the monkey’s health. The day after, they tranquilize and kill the monkey, finding that no damage or negative effects occurred besides the slight weight gain. The report says that all the monkey corpses were then disposed of afterwards.