The document summarizes key conventions in possession horror films from the early 2010s such as Sinister and Insidious. Some common conventions discussed include:
1) Films being set in isolated, abandoned locations away from civilization with dim lighting and dingy interior settings.
2) Children often being the targets of demonic possession since they are seen as innocent and can be manipulated as puppets.
3) Outsiders sometimes being brought in to help deal with the possession threatening the family.