Not usually. Two-sentence horror stories are often the product of creative imagination, designed to shock and thrill in a short span. But sometimes, they might draw inspiration from common fears or urban legends.
In many cases, two-sentence horror stories are pure imagination. They're crafted to evoke a sense of terror using creative and sometimes fantastical elements, not real-life happenings.
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.
One way to sentence horror stories is to build suspense gradually. Start with an ordinary setting or character and then introduce strange elements little by little. For example, you could begin by describing a normal day in a small town. Then mention a strange noise that no one can identify or a person who behaves oddly. Use vivid language to describe the uneasiness that starts to spread among the characters. This makes the readers feel on edge as they wonder what will happen next.