"Just what were the hikers fleeing from?" 1091 Pictures has unveiled a trailer for a chilling investigative doc called An Unknown Compelling Force, about the mystery of Dyatlov Pass in Russia. You've probably heard of this place before, as they've tried to make horror films about it for years, but it remains a mystery. As it likely will forever. British adventure filmmaker Liam Le Guillou travels under the radar to Russia in search of answers. Braving the dangerous conditions and hundreds of kilometers in sub-polar conditions, the documentary team attempts to reach the very location of the incident, a place the locals call "The Dead Mountain." The film interviews Russian investigators, a former