Not all 'them the scare' movies are based on true stories. Some are purely fictional creations of the filmmakers' imaginations. However, the ones that are based on true stories can be really interesting. They might be inspired by things like real - life hauntings, historical events with a spooky side, or unexplained phenomena. By basing the story on something real, it can add an extra layer of creepiness because viewers know that similar things could potentially happen in real life.
It's difficult to name exact 'them the scare' examples without more details. But think about movies that are based on true - life exorcisms. If 'them the scare' has elements related to that, they could be based on real accounts of exorcisms. These types of movies often take the real - life experiences of the people involved, such as the possessed person, the priests or exorcists, and the strange events that took place during the exorcism, and turn them into a horror narrative for the big screen.