You are wrong, Zach. (the guy who posted above me) A ghost is someone who has passed away, but got stuck on earth. A ghost doesn't know that they are dead. A ghosts energy can vary from cold to hot. A ghost can't physically harm you. A Poltergeist on the other hand can be very physical and violent. A spirit knows they are dead, a spirit can be anything from a demon, an angel, a messenger, etc. A spirit can even be God himself. Check your Facts Zach. I been doing Ghost/Spirit study for quite some time. Usually in a ghost or spirit case, you can order an Excorist, or one of my cherokee brothers, such as a Shaman.
I lived in a house haunted by a Poltergeist for 2 years when I was little. (True Story)