For centuries people have speculated about the wild things that might live deep within the woods. One popular theory is witches; people believe witches live in the forest and cast curses on those who enter. This may be rooted in the many fairy tales which depict the exact same thing.
Some people also believe that wild creatures, such as the ones described in ancient folklore and mythology, hide within the trees, and seek to scare you. These creatures include everything from angels, to devils, to demons. Some people even believe woodland nymphs and goblins inhabit the forest.
There is no way to determine what spirits are going to stick around and what spirits will move on. Some people who died a horrible, gruesome death are able to move on, but others who simply don't know they died, or are in denial, will not move on. They will continue to walk among the living, sometimes trying to communicate, sometimes trying to torment....