TYPES OF SPIRITS
RESIDUAL - Residual Hauntings are "recordings" of an event in time that are left at a location, that are played back at a later time.  Many hauntings are thought to be residual in nature (foot steps in hallways, battles on battlefields, seeing someone walking down a certain staircase, etc.).  They are endless loops of the same scene being played over and over, and they are usually always experienced in the same location.

ANNIVERSARY - Anniversary ghosts do, as the title suggests, only appear on an anniversary of some significance like deaths, birthdays and other times that held some meaning for the deceased or are of historical significance to them.  Since this type of ghost only appears on the anniversary of a special event, it seems likely this type of haunting could be a residual haunting, reenacting a certain event in the time on that one day or night.

INTELLIGENT - Unlike residual hauntings, these type of ghosts are not in a "stuck in time" type of deal.  They actually seem to have intelligence.  These spirits are interactive, sometimes verging into the territory of the poltergeist.  They may try and attract you attention by creating odors, moving things, making noises such as footsteps, slamming doors, or moving and hiding objects.

POLTERGEIST - The Poltergeist-German for "noisy spirit"-seems to be between the categories of ghost and psi (the term applied to unusual abilities of human origin such as ESP and psychokinesis and investigating "exceptional human experiences" such as out of body and apparitional experiences).  There's usually two camps of thought on this subject.  Some believe it all to be caused by intelligent ghosts, and some believe it all to be caused by the living person at the location (ESP/Psycokinesis).

        
           DIFFERENT STAGES/LEVELS OF POLTERGEIST ACTIVITY:

STAGE 1:  Referred to as a Senses Attack because in the early stages of a poltergeist the activity mainly revolves around the human body's basic senses.
Cold spots, strange odors and smells, hearing footsteps, unusual animal activity (dogs/cats running from rooms, etc), feelings of being watched.

STAGE 2:   This level is where the noises and smells begin to turn into something more direct.  Everything is still at it's basic level but turned up a few notches.
Wispers, laughs or giggles, moans or shrieking, moving shadows, breezes in closed areas, visible clouds (base apparitions), strong static electricity, marks on floors or walls (not writings).

STAGE 3:  At this stage the poltergeist begins to make it's presence felt.  The difference is that in the first two levels it could be said that it was the mind playing tricks, but now, it's hard not to notice something real is happening.  This is the level that the classic haunting falls into.  Lights and other electrical appliances turingin on/off, unseen hands grabbing or touching people, writhing on walls or pattern makkings, doors that open/close or lick/unlock, hearing voices or words clearly, full apparitions or dark figures, showing levels of communication with living people.

STAGE 4:  This is where an advanced poltergeist begins to gain momentum.  Moving closer to the danger level and picking up a clearer conciousness.
Flying/moving objects, objects disappearing and reappearing elsewhere, shaking furniture, pushing or shaking people, windows, morrors or other household objects breaking for no reason, levitation.

STAGE 5:  At this level the poltergeist is at it's highest energy point and should be considered dangerous, not because it wants to hurt people, but just because it has a great deal of energy and could end of hurting someone with it (either on purpose or by accident).  The time frame here, and for all stages listed, will vary depending on the poltergeist.  It could end in days, months or years.  After this stage, the poltergeist will usually go darmant and then begin this cycle over again.
Dangerous activity, biting, slapping or punching, animating objects, use of household electrical systems, hair pulled, heavy objects falling.

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