What is a poltergeist ?

A poltergeist is a disembodied spirit who can be a bit of a trickster. They can cause a lot of disturbances. I heard they can hide things like your shoes. Then they will show up in strange places or even return to the same place at a later time. They can make noises like knocking and move or throw things. Even break stuff. They are also known to be violent in some cases and cause a lot if chaos. You may see sudden movements. See things fly across the room or see a chair move. They have even been known to cause fires or trip people down the stairs. These are just many examples of the force they have.