Here's another: 'The old doll in the corner blinked. I was alone in the room.' This is creepy because dolls are often associated with unease, and the idea of it blinking when no one else is around is quite terrifying. It plays on our fear of the inanimate coming to life.
A third example is 'I heard a whisper in my ear. The room was empty and soundproof.' The whispering when there should be no one around creates a sense of dread. It makes you wonder what could be making that sound in an otherwise empty and silent room.
My phone took a picture by itself. In the photo, there was a figure behind me.
The doll's eyes followed her across the room. Dolls are inherently a bit creepy, especially when they seem to have a life of their own. The idea that its eyes can move and follow someone is really terrifying as it goes against the normal inanimate nature of a doll, making it seem like it has a mind or some sort of sinister intention.
I heard a knock on the door at midnight. When I opened it, no one was there, but I felt a cold hand on my shoulder.
Example 1: I heard a noise downstairs. When I checked, there was no one there, but the front door was wide open. Example 2: She woke up in the middle of the night. A dark figure was standing at the foot of her bed.
One example could be: 'I woke up in the middle of the night. There was a figure standing at the foot of my bed with no face.'
One example could be: 'I woke up to a cold hand on my shoulder. In the mirror, I saw no one behind me.'
Another is 'The old house was silent. Then I heard the sound of a rocking chair moving on its own.' Here, the first sentence sets a spooky scene of an old, quiet house. The second sentence adds the horror element by introducing an unexplained and creepy sound of a rocking chair moving without anyone seemingly around to move it.
There's the story of 'The Tell - Tale Heart'. A man kills an old man because he can't stand the old man's 'evil eye'. After burying the body under the floorboards, he starts to hear the old man's heart still beating, which drives him to confess his crime. The psychological torment and the narrator's unreliable mind make it truly creepy.
Isolation is another factor. Consider 'I was stranded in the old house. I felt eyes on me from every corner.' Being alone in a spooky place and feeling watched, even though there's no visible source, is a classic horror trope that makes the story very creepy. It makes the reader feel the character's vulnerability and fear.
Story 1: I woke up to a cold hand on my face. When I turned on the light, no one was there.