I am a sophisticated adult. I have seen thousands of movies. I can watch zombies, vampires, serial killers, sharks, alligators. Snakes, demons,live beheadings without batting an eye. But holy crap this movie scared the bejeesus out of me to the point of having to pause it, going for a walk and a drink to calm down, before resuming watching. This is serious blood curdling stuff. You have been warned.