For as long as we’ve gathered by campfires to tell ghost stories, humans have always loved a good scare. From the splatter flicks of the 70s, to Japan’s obsession with drowned girls, to creepy modern experiences like the overnight ghost hunt at the Trans-Allegheny Lunatic Asylum, the horror industry has thrived across time and cultures. Our obsession with getting scared is obvious to anyone who visits ScareHouse, a haunted house in Pittsburgh that is annually ranked among the scariest in the country, and has become a booming attraction with nearly 150 employees and lines wrapping around the block. It even has its own sociologist, who conducts surveys and observations to make its performances ever more terrifying. Her name is Margee Kerr.