‘“What I am about to show you is very difficult to experience; once you have been inside, there’s no turning back, ” narrates Jose Valle just before he walks you into a pig farming facility in Mexico. “This is your last chance to leave.”

The ominous warning marks the beginning of a new documentary investigation by Animal Equality, an animal protection organization, and Condition One, a virtual reality production company. The film, Factory Farm, premiered at Sundance Film Festival, but is seen here for the first time.’

Read more: New Virtual Reality Investigation Reveals the Shocking Horrors of Factory Farms