The actual winner, Thomas Hicks, was near collapse and hallucinating when he crossed the finish line, a side effect of being administered brandy, raw eggs, and strychnine by his trainers.

why the fuck did they give him strychnine

Thomas Hicks ended up as the winner of the event, although he was aided by various measures that would not have been permitted in later years.[9] Ten miles from the finish, Hicks led the race by a mile and a half, but he had to be restrained from stopping and lying down by his trainers. From then until the end of the race, Hicks received several doses of strychnine (a common rat poison, which stimulates the nervous system in small doses) mixed with brandy and egg white.[2] He continued to battle onwards, hallucinating, and was barely able to walk for most of the course. When he reached the stadium, his support team carried him over the line, holding him in the air while he shuffled his feet as if still running.[6] Hicks had to be carried off the track on a stretcher, and might have died in the stadium had he not been treated by four doctors. He lost eight pounds during the course of the marathon.[6][10]

what the fuck

Still fared better than the first guy to run a marathon

The pure chaos of this race.

For anyone interested in learning about this in video form, Jon Bois has you covered