Alone in the dark.
'Eyes in the mirror.' This is really creepy. When you think about seeing eyes in a mirror where there should be only your reflection, it's a very disturbing thought. It gives the feeling that something is watching you from the other side of the mirror, or maybe even inside the mirror itself.
Here are some: 'Alone in the dark.' It gives a sense of isolation and the unknown in the darkness which is quite terrifying. Another one could be 'Footsteps, no one there.' Just the idea of hearing footsteps but seeing no one is really spooky. And 'Lost in the forest' also works. Being lost in a vast and often unpredictable forest is a nightmare scenario.
How about 'Knock, no one there.' You hear a knock at the door, but when you open it, there's nobody. It leaves you with a sense of unease and the feeling that something is playing tricks on you.
One night, I was alone in my old, creaky house. I heard a strange scratching at the window. When I peeked out, there was a pale face with hollow eyes staring back. I ran to my bedroom and locked the door. But then I saw a shadow seeping in from under the door. It slowly took the form of a hand, reaching for me. I screamed but no one could hear me. As it grabbed my ankle, I woke up. It was all a nightmare, or so I thought. But then I saw the scratches on my ankle.
Once upon a midnight dreary, I was alone in an old, creaking house. The wind howled outside like a banshee. I heard strange noises coming from the attic. With a trembling hand, I held my flashlight and climbed the rickety stairs. As I reached the attic, a cold gust blew out my light. In the pitch black, I felt a presence. Then, a pair of glowing eyes emerged. I tried to run, but something grabbed my ankle. I screamed, but no one could hear me. I was trapped in this nightmare, at the mercy of the unknown horror that lurked in the attic.
Once upon a time, there was a word 'lonely'. It seemed to grow in the dark corners of a man's mind. Every time he thought of it, it became a living entity. It whispered to him at night, making him feel more and more isolated from the world. Eventually, the power of this single word drove him to the brink of madness.