What are the scariest 'instinct two sentence horror stories' you know?

My phone rang in the middle of the night. It was my number calling me.

I found a tooth on my pillow. Not mine. Then I heard a whisper, 'I'm coming for the rest of them.' I shuddered, knowing I was in danger.

One that scares me is 'The phone rang in the empty house. When he answered, all he heard was heavy breathing.' It gives a sense of immediate dread.

Teatime came. As I reached for a biscuit, a cold finger tapped my hand from under the plate.

He looked in the mirror. His reflection had a sinister smile that he didn't make. Well, it's really scary because the mirror is supposed to reflect our true selves. But when the reflection has a mind of its own, like showing a sinister smile that doesn't match what we are doing, it creates a sense of unease and horror. It makes you question what is real and what is not. Is there something wrong with the mirror? Or is there something wrong with you? It plays with your mind and makes you feel like you are not in control. And that's the essence of horror in this simple two - sentence story.

The phone rang in the middle of the night. It was my voice on the other end begging for help.

One scary one is 'The old dormitory elevator always groaned. Today, it sang a lullaby.' The sudden change from an ordinary, if a bit concerning, sound to something so much more eerie makes it quite frightening.

This one is really creepy. 'The mirror fogged up, but I was alone in the bathroom. A handprint appeared on the glass.' It gives me chills just thinking about it. The idea that something is in the bathroom with you when you thought you were alone is a classic horror trope, and the handprint on the fogged - up mirror makes it even more terrifying.

The butcher shop was dark. A meat worm as big as my finger was feasting on the raw meat.

I saw a child's ball roll into a dark alley. When I went to get it, a pale hand reached out for it instead of me. It was so sudden and unexpected that it sent chills down my spine.