Some skeptics theorise that electromagnetic polution may be interfering with the brain to cause halucinations. I've heard this in regard to UFOs,
abductions or visitations and hauntings.
I saw a documentary many years ago on the subject, one case that stands out in mind was a couple that believed they were the victims of a poltergeist,
every morning they'd wake to find all the shoes in the house arranged around the edge of the kitchen table. Concerned they contacted a paranormal
investigator, who set up some surveilance and discovered it was the husband who in a trance like state was doing this himself, it turned out that he
was extremely sensitive to electromagnetism and they were situated quite close to power lines.
The show also speculated that old granite castles and also eathquakes can produce electromagnetic fields, hence ghosts, voices and UFOs.
While I think the theory has some merit I don't think it can account for all cases. Especially those with photos
In January of this year I was driving past some large powerlines and I saw a very intense bright light rise up behind a hill, I could see the glow of
the object over the hill before I saw the light, almost like a miniture sunrise type of effect, It rose straight up at a steady pace before I lost it
behind some trees. I was dumbfounded, I've seen a few unidentified objects before all of which could be explained conventionaly like balloons, blimps
or satellites but I have no explanation for what this was, the light was extremely intense and looked like nothing I've seen before.
[edit on 27-4-2007 by squiz]