Sufferers describe a "mental script" that plays in their head involuntarily:

I see. And how does this fear affect your daily life?

Apeirophobia " is both a clinical phobia of infinity and a popular horror game, this essay explores the game's script-writing and design through the lens of its central theme: the terror of the endless.

I blinked. My bedroom was gone. My desk, the posters, the window showing the city skyline—all replaced by smooth, curved walls, faintly damp. A corridor. No doors. No seams. The air tasted of nothing.

Here’s a to understanding, identifying, and working with apeirophobia (fear of eternity/infinity) in a script — whether for a film, game, or narrative podcast.