One 'little monsters two sentence horror story' could be: I woke up to a soft growl. There was a little monster sitting on my chest, staring into my soul. Also, here's another: I saw a shadow of a tiny figure. When I turned around, a little monster was right behind me with a menacing grin.
Here is another. 'The little monster hid under my bed. Every night, it whispered my name in the dark.' This simple two - sentence horror story creates an immediate sense of unease. Just the idea of a hidden presence under the bed that knows your name is quite terrifying. It plays on our common fear of the unknown in the dark, and the fact that our own personal space, like our beds which are supposed to be safe, can be invaded by something so menacing.
The fact that they involve little monsters is key. Little things that are out of the ordinary can be scarier than big, obvious threats. For instance, 'I found a little monster's footprint on my pillow. Then I saw it watching me from the corner.' The idea of a small, uninvited and potentially dangerous creature in our personal space is very unsettling. It's like our safe havens are being invaded by something we don't understand and can't easily control.
Another really scary one could be 'My phone rang at 3 am. The caller ID said it was me.' It plays on the idea of the self being something other or unknown, and calls at that time are always spooky.
I think 'The clock stopped at midnight. Then I heard footsteps.' is quite scary. It gives this feeling of something ominous starting right at a spooky time.
Some two - sentence horror stories are truly spine - chilling. For example, 'I woke up to a noise in the kitchen. When I got there, all the knives were floating.' The simplicity of the setting and the unexpected, supernatural element make it effective. Another one could be 'She heard a baby crying in the attic. She doesn't have a baby.' It plays on our primal fears of the unknown and the unexpected in a very short space, creating a sense of unease and horror.