Screenwriters are arguably some of the best predators around. They lure the audience in with crazy stories, taking them to worlds they never thought possible. Then, when the viewers least expect it, WHAM!, they go and throw in a plot twist the audience never saw coming. Take Shutter Island, for example. Who would have guessed that Leonardo DiCaprio’s character was actually someone in the asylum…
https://www.trend-chaser.com/entertainment/the-biggest-plot-twists-in-film-you-never-saw-coming/