Director Ruben Östlund acquired inspiration for some scenes in the screenplay from real footage on YouTube. For example, the avalanche which serves as a momentum early in the story was inspired by a video Östlund found on YouTube, and a performance by a 12-year-old accordionist of Vivaldi's "Summer" was taken directly from a YouTube clip and played repeatedly throughout the film.
One of the last scenes in which a bus gets stranded on a steep hill is a near-identical re-enactment of an Internet video known as "Idiot Spanish busdriver almost kills students".