Are they real?

When one dies, where does he go?
Does he leave his body and turn into something else?
Or does he decide to stay in that body trapped forever.
Most spirits decide to leave their body,
But yet they don’t know where to go.
Lost, angry, afraid, and misguided.
Within years, they might even grow violent,
It drives them crazy how alone they really are.
When a human encounters one of these beings,
They seem to be afraid,
But afraid, is actually what the spirit is feeling.
No one really understands them,
I guess I don’t either.
They’re usually born by violent deaths.
Or revenge on the people that hurt them.
“Unfinished business”
They can’t let go of their loved ones.
How do you think angry spirits are born?