Spontaneous phenomena, commonly referred to as hauntings, are a significant focus of postmortem survival research in parapsychology. These events typically involve recurring paranormal activities in specific locations, which are often associated with the presence of spirits or ghosts. Hauntings can manifest in various forms, including visual apparitions, unexplained noises, physical movements of objects, and other sensory experiences.

Hauntings are typically categorised into two types: residual and intelligent. Residual hauntings are often described as a "recording" of past events that replay repeatedly. The entities involved do not interact with the living; instead, they go through the motions from their past life, like an apparition walking down a hallway at the same time every day without acknowledging the observer's presence. In contrast, intelligent hauntings involve spirits that are aware of and can interact with the living. These spirits might try to communicate, respond to questions, or manipulate objects to make their presence known.

Several...