Here's an interesting story: there is a phenomenon observed worldwide called the so-called house exorcism ritual, which is actually a cross-cultural psychological self-healing method rather than a display of supernatural powers. Regarding some paranormal phenomena we see and feel in those "haunted houses," such as feeling inexplicably anxious, suffocated, cold, or catching a fleeting shadow in the corner of the eye, all have solid scientific explanations.

The reason for this is that human ears can only hear sounds between 20Hz and 20,000Hz, and old houses' ventilation ducts, underground drainage, or wind resonance often produce low-frequency sound waves around 18.9Hz. This is called infrasound, a "fear frequency" that humans cannot hear but can genuinely feel.
From a scientific perspective, when this infrasound appears, it directly causes resonance with human internal organs, prompting a surge of stress hormones (cortisol), which biologically triggers anxiety, a feeling of being watched, and near-death panic. More intriguingly, 18.9Hz is very close to the physical resonance frequency of the human eyeball, causing tiny tremors in the eyeball, which can make blurry "gray shadows" appear in peripheral vision. When you turn your head to look directly, they vanish—this is the source of "ghost images." Additionally, mold or trace amounts of carbon monoxide leaking in dark old houses can cause neurotoxicity, leading to hallucinations and paranoid delusions.
Therefore, the so-called "exorcism rituals" are essentially a combination of physical purification and psychological suggestion. During the ritual, people open doors and windows for ventilation, use incense to mask mold, and perform loud recitations and ritual instrument strikes to break the physical resonance of infrasound; at the same time, the sacred ritual injects a strong "safety suggestion" into the homeowner's brain. Once the tense autonomic nervous system relaxes, insomnia and paranoia caused by anxiety naturally improve.
In summary, although exorcism practices around the world vary greatly in form, their core is highly consistent. This is not because there are universal "demons" worldwide, but because humans across the globe have similar brains and nervous systems. When faced with physiological discomfort caused by harsh environments, different cultures have developed holy water, talismans, Buddhist scriptures, and witchcraft as cross-cultural remedies for "spatial anxiety disorder."
However, if we continue to extend this phenomenon outward, science still leaves some unexplained mysteries. For example, the "spatial memory residue" hypothesis: some scientists suspect that during extreme pain or death, the brain's strong electromagnetic signals might be recorded by walls containing specific minerals (like quartz or iron ore) like a tape recorder, and replayed under certain weather conditions. The physical mechanism of how these materials carry spiritual energy remains an unexplained area in science to this day.