The line comes from Forrest Gump, the 1994 film about a kind-hearted man whose life crosses major moments in American history. As a boy, Forrest is chased by bullies, and Jenny shouts for him to run, a moment that becomes a turning point when his leg braces break and he discovers he can sprint. The phrase lived on as a quotation long after the film, then spread through meme edits and reaction videos where any sudden dash or escape calls for the same urgent encouragement. It endures because the scene is widely recognised and the delivery is instantly dramatic.