I was reading this Telegraph article about what is real and isn't real in The Revenant, and the author mentions that "several runners had to be eaten" in the process of making the film. What does she mean by runner? Is this movie industry jargon? This is the paragraph in which I read that snippet:
Given the overwhelming emphasis that has been placed on the film’s authenticity – the cast and crew went through five months of “hell” to make it, director Alejandro Iñárritu only shot in natural light, several runners had to be eaten – it’s difficult not to turn into the post-torture version of Peeta from The Hunger Games, and repeatedly ask “real or not real?” when confronted with some of The Revenant’s more horrific excesses.