The mystery surrounding the backstories of the animatronics is quite scary. You don't know what really happened to them before they became these haunted - like beings. It makes you wonder what kind of dark secrets are hidden within their mechanical frames. And as you read through the stories, the sense of dread builds up as you learn more about their possible motives for scaring the characters in the stories.
The animatronics' menacing appearances are quite scary. Their distorted forms and the way they move in the graphic novel can send shivers down your spine.
The scariest part is the nightmares. Just the idea of being hunted by those creepy animatronics in your sleep is terrifying.
The appearance of the animatronics in unexpected places is really scary. For example, when they suddenly show up in the dark corners of the pizzeria in the stories.
The scariest part is Pennywise's ability to take on different forms. It can be whatever your deepest fear is, whether it's a monster from your nightmares or a person who has hurt you in the past. This makes it extremely difficult to anticipate what he will look like when he appears.
In the first story, the scariest part is when the boy saw the red eyes staring at him from the attic window. It was a sudden and menacing encounter. In the second story, the cold hand grabbing the girl's ankle was terrifying as it was unexpected and she was all alone. For the third story, the dark figure lunging at the family when they opened the hidden door was the scariest moment as it was a direct threat.
In some of the stories, the sudden appearance of the supernatural entities is the scariest part. Like in the haunted house story, when a ghostly figure just pops up in front of you out of nowhere. It gives you an instant shock.
The immediate deaths of the plant workers due to extreme radiation exposure are very scary. They were just doing their jobs and suddenly faced a horror they couldn't escape.
One of the scariest parts is getting caught in bad weather. When strong winds and large waves hit, it's a fight for survival. Just like in that story where the kayaker was in the middle of a lake during a storm and the kayak could easily flip.
The sense of the unknown in '25 ghost stories' is also quite terrifying. For instance, when a character starts to experience strange events but has no idea what's causing them. It could be a ghostly presence, but they don't know its motives or how to stop it. This lack of knowledge builds up fear.
The scariest part can be the unknown. For example, arriving at a scene where you don't know what's waiting for you. Maybe it's a dangerous criminal or some unseen hazard.