In ghostlore, a poltergeist ( or ; German for "rumbling ghost" or "noisy spirit") is a type of ghost or spirit that is responsible for physical disturbances, such as loud noises and objects being moved or destroyed. Most claims or fictional descriptions of poltergeists show them as being capable of pinching, biting, hitting, and tripping people. They are also depicted as capable of the movement or levitation of objects such as furniture and cutlery, or noises such as knocking on doors. Foul smells are also associated with poltergeist occurrences, as well as spontaneous fires and different electrical issues such as flickering lights. They have traditionally been described as troublesome spirits who haunt a particular person instead of a specific location. Some variation of poltergeist folklore is found in many different cultures. Early claims of spirits that supposedly harass and torment their victims date back to the 1st century, but references to poltergeists became more common in the early 17th century. Etymology The word poltergeist comes from the German language words poltern ("to make sound" and "to rumble") and Geist ("ghost" and "spirit"), and the term itself translates as "noisy ghost", "rumble-ghost" or a "loud spirit". A synonym coined by René Sudre is thorybism, from Greek θορυβείν ("to make noise or uproar; throw into confusion"). Suggested explanations Many claims have been made that poltergeist activity explains strange events (including those by modern self-styled ghost hunters), however their evidence has so far not stood up to scrutiny. Natural phenomena Many claimed poltergeist events have been proven upon investigation to be hoaxes. Psychical researcher Frank Podmore proposed the 'naughty little girl' theory for poltergeist cases (many of which have seemed to centre on an adolescent, usually a girl). He found that the centre of the disturbance was often a child who was throwing objects around to fool or scare people for attention. Skeptical investigator Joe Nickell says that claimed poltergeist incidents typically originate from "an individual who is motivated to cause mischief". According to Nickell: In the typical poltergeist outbreak, small objects are hurled through the air by unseen forces, furniture is overturned, or other disturbances occur—usually just what could be accomplished by a juvenile trickster determined to plague credulous adults. Nickell writes that reports are often exaggerated by credulous witnesses. Time and again in other "poltergeist" outbreaks, witnesses have reported an object leaping from its resting place supposedly on its own, when