The fear is short-term and negative feeling. Everyone has their own set of fears. Some are afraid of dental pain, but totally comfortable with the risk of global catastrophe. Fear serves a protective function, protecting the person from the action that could lead to health problems or death. An extreme state of fear is horror and panic that can lead to a nervous breakdown. Nevertheless, many people experience pleasure, watching horror movies. We can assume that it is caused by activating certain processes in the body, in particular, the production of adrenaline.