After the 9/11 apocalypse happened in New York City, people, particularly New Yorkers, who breathed in the ash, or saw the results of that, have a tendency to keep seeing echoes and having flashbacks to it.
Stephen KingWe sometimes need to create unreal monsters and bogies to stand in for all the things we fear in our real lives.
Stephen KingDon't look back, never look back. How often do people tell themselves that after an experience that is exceptionally good (or exceptionally bad?)? Often, I suppose. And the advice usually goes unheeded. Humans were built to look back; that's why we have tat swivel joint in our necks.
Stephen King