76
" There might some truth to this, since ghosts fade over time. There are few, if any, spirits that can be attributed to cavemen or ancient civilizations like Rome or Greece. In fact, it’s difficult to find any spirits that can be attributed to a living person more than five hundred years old. So why do they fade away? Could it be that the water in the building that they occupy is evaporating slowly and taking their memory with it? If this is true, then maybe bodies of water (rivers, lakes, or moats) are storing the residual energy of the living as well. We know that EMF increases around water, so with a dedicated study, we may be able to show that the top 500 most haunted places in the world are on or near a body of water and therefore have a relationship to paranormal activity. "
― Zak Bagans , Dark World: Into the Shadows with the Lead Investigator of The Ghost Adventures Crew
77
" An intelligent haunting is just as it sounds—a spirit who is aware of its surroundings and (usually) its situation. Sometimes a spirit knows that it’s dead and its spirit has remained in the physical plane, but other times it doesn’t know. An intelligent haunting is a spirit that maintains its identity, memories, and personality after death. They can be good, bad, virtuous, benevolent, mischievous, evil, or just lonely. "
― Zak Bagans , Dark World: Into the Shadows with the Lead Investigator of The Ghost Adventures Crew
78
" Do people mistake natural weather phenomena as paranormal activity? On the other hand, can certain weather conditions actually increase spiritual activity? There are some who say rain, wind, relative humidity, temperature, barometric pressure, solar activity, infrasound, seismic activity, the geomagnetic field, and the phases of the moon can be mistaken for ghost activity. I think this happens sometimes, but I also believe that the right weather conditions can unlock paranormal activity and actually help make it happen. British lecturer Vic Tandy’s experience with infrasound is a great case study on the effects of weather and the paranormal and is something every investigator should know. "
― Zak Bagans , Dark World: Into the Shadows with the Lead Investigator of The Ghost Adventures Crew
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" Infrasound is sound that is lower than the normal limit of human hearing, usually quantified at 20 hertz or cycles per second. Infrasound sometimes results naturally from severe weather, surf, lee waves, avalanches, earthquakes, volcanoes, waterfalls, auroras, and lightning. It’s believed that animals can detect infrasound and it is the reason they flee when severe weather, like a tsunami, is approaching. So Vic Tandy saw a ghost in his lab and attributed it to infrasound playing tricks on his mind. "
― Zak Bagans , Dark World: Into the Shadows with the Lead Investigator of The Ghost Adventures Crew