Here are the five known levels of Poltergeist activity.

 
Level 1.  Senses Attack
 
Cold spots, hearing voices, not able to understand what they are saying, strange noises, odd odors and smells, hearing foot steps, unusual animal activity (like dogs or cats running from rooms, ect.) feelings of being watched.
 
Level 2. Communication
 
Presence felt.... No longer mind tricks
 
Whispers, laughs or giggles, moans or shrieking, moving shadows, breeze in closed areas, visible clouds (base apparitions) strong static, electricity, marks on the floors or walls- not writing.
 
Level 3. Electrical Control
 
Lights and other electrical appliances turning off and on, unseen hands grabbing or touching people, writings on the wall or pattern markings, doors open and close or lock and unlock, hearing voices or words clearly, full apparitions or dark figures, showing levels of communication with living people, strange telephone calls.
 
Level 4. The Trickery Stage
 
It gains knowledge of what scares you....
 
Flying objects, moving objects, objects disappearing and reappearing else where, shaking furniture or beds, fire starting, appearing as frightening entities, pushing or shoving people or shaking them, creating visions or illusions, speaking in ordering tones, people feel dizzy, nausea or sick to their stomach, windows, mirrors or other house hold objects breaking for no reason.
 
Level  5. The Danger Level
 
Dangerous activity, biting. slapping or punching, rape, animating objects- possession, use of house hold electrical systems to cause harm, fires and burning, blood on the walls-floor or ceilings, attacked by unseen forces, held down, hair pulled, flying knives or other sharp objects, heavy objects falling, treating writings or visual signs.
 
 Poltergeist last for an unknown period of time, but after level 5 it'll lay dormant and then back to level 1 andit builds up again