Fear, this ghost, look at this example. Pretend you are alone in your house. It is dark and you are in your bed with your door shut. In what seems like a minute, there is a thud on your window. You think that it is a ghost but it is the wind. But see this example. When you are sleeping with your door closed, alone, there is a thud on the window. You think that it is the wind but it is a ghost. It is less dangerous or shocking if you think that it is a ghost first.