The 1904 Olympic marathon had a South African runner, one of the first black participants, lose partially because they were chased a mile off course by a pack of wild dogs. https://en.wikipedia.org/wiki/Len_Taunyane
The entire race was bonkers, I like fourth place having taken a nap after eating rotten apples he stole from an orchard. https://en.wikipedia.org/wiki/Athletics_at_the_1904_Summer_O...