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.
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.
My reflection waved at me. This is extremely creepy because our reflection is supposed to be just that - a reflection. When it takes on a life of its own and waves, it shatters the normal perception we have of ourselves in the mirror. It makes you question what is really on the other side of the mirror, as if there is an alternate and perhaps malevolent version of you.
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.
Here's one: 'The last page of the book I was reading had my name written in blood.' Reading is usually a safe and solitary activity. But when something as sinister as your name written in blood appears on the page of a book you're reading, it creates a sense of dread. It's as if the book is somehow connected to you in a very dangerous and unknown way. It could mean that there is a malevolent force that has targeted you specifically through the book.
I'll share this. I found a diary in an old attic. The last entry said 'They're coming for me tonight' and then the handwriting turned into scribbles. I started to hear scratching noises on the attic door right after reading it.
One could be 'I woke up to find my reflection smiling back at me, but I wasn't.' It creates an immediate sense of unease as it plays on the idea of something being wrong with one's own reflection, which is often associated with the self. It makes you wonder what has taken over your appearance.
Story 1: I woke up to a cold hand on my face. When I turned on the light, no one was there.
Here's another: 'The old doll in the attic blinked. I ran out and never went back.' This creates a sense of unease with the simple and unexpected actions. The blinking of the doll, which is an inanimate object, is very creepy.
One story could be: 'I heard a scratching at my window. When I looked, there was a shadow with no face.'
One story could be: 'I woke up to a strange noise in the attic. When I went to check, a pair of glowing eyes stared back at me.'