No film school

https://nofilmschool.com/2017/01/watch-wes-craven-scream-red-herrings-foreshadowing

Reading this article and watching the video was very interesting because is shows that red herrings art always obvious and shows how misleading they can be. They keep the audience guessing and looking at specific detail which keeps them feeling tension because they don’t know who the killer is or what is going to happen next because as much as they can guess they can’t be certain but they want to know if they are right.

https://nofilmschool.com/2016/11/watch-how-hide-character-and-story-your-dialogue

https://nofilmschool.com/2018/06/deus-ex-machina-laziest-way-spoil-your-screenplay

Making sure you understand foreshadowing and how it works will help make sure you don’t spoil your film using a deus ex machina. If it is planned to have a random eagle swoop down to save you then at least give it a place in the script before it is needed so it fits with the story and doesn’t seem to just be magically appearing out of luck. Many films are known to use deus ex machinas to get characters out of tricky situations were they should die but don’t. When you plan for a unusual moment you have to foreshadow subtly so it goes unnoticed but it registered subconsciously so that unusual event makes more sense in their world.

What also helps us believe fantasy worlds is the opening sequence, what font is used and what is shown before the film even begins which takes you into the mind were virtually anything could be possible.