The horror film "The Descent" is already a terrifying ride, but one fan theory makes the whole ordeal all the more insidious.

Add Yahoo as a preferred source to see more of our stories on Google. Sarah (Shauna Macdonald) goes through bloody hell in "The Descent," returning to U.K. theaters Friday. Photo courtesy of Park ...

Learning cool behind-the-scenes trivia about some of my favorite movies, even decades after they've been released, is one of my simple pleasures. Neil Marshall's "The Descent" — likely the most ...