Watch Online Free. We know what you're afraid of. Turn out the lights and go "behind the screams" of Universal Orlando's Halloween Horror Nights 12. Explore each terrifying haunted maze and see how they were designed and constructed. And discover how the event creators play on your deepest, darkest fears to bring your worst nightmares to life. It's a never-before-seen look into one of the biggest and scariest annual Halloween events in the world.