In the late 1870s, Eadweard Muybridge, an innovative photographer, produced one of the earliest “moving pictures” by documenting a series of “chronophotographs” featuring horses and riders. Notably, the 12-frame sequence named “Sallie Gardner at a Gallop” is recognized as a pivotal moment in the evolution of motion pictures. This project was commissioned by Leland Stanford, an industrialist and the founder of Stanford University, who aimed for a detailed understanding of horse movements to improve horse-breeding methods. Muybridge’s groundbreaking application of shutters, triggers, and emulsions not only pushed the boundaries of photographic techniques but also played a crucial role in equine reproduction by allowing for more educated breeding choices. The historical context surrounding these visuals includes the erasure of Sallie Gardner’s Black jockey, whose identity continues to be a matter of dispute, as emphasized in Jordan Peele’s film “Nope.” Furthermore, Muybridge’s personal story, including the killing of his wife’s lover, adds a nuanced dimension to his legacy. Nowadays, gait analysis using video recording is a commonplace method in horse-breeding, highlighting the enduring influence of Muybridge’s contributions to both photography and equine science.