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I would say Rewatch Bonus or The Ending Changes Everything. As a discovery writer, I often don't know my ending until I have written 50% or even 70% of my first draft. So when I am done I actually...
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#4: Attribution notice removed
Source: https://writers.stackexchange.com/a/46571 License name: CC BY-SA 3.0 License URL: https://creativecommons.org/licenses/by-sa/3.0/
#3: Attribution notice added
Source: https://writers.stackexchange.com/a/46571 License name: CC BY-SA 3.0 License URL: https://creativecommons.org/licenses/by-sa/3.0/
#2: Initial revision
I would say [Rewatch Bonus](https://tvtropes.org/pmwiki/pmwiki.php/Main/RewatchBonus) or [The Ending Changes Everything](https://tvtropes.org/pmwiki/pmwiki.php/Main/TheEndingChangesEverything). As a discovery writer, I often don't know my ending until I have written 50% or even 70% of my first draft. So when I am done I actually go back through and look for moments in which I can rewrite a scene for foreshadowing, or add Rewatch Bonuses, sometimes just by modifying dialogue or adding an observation of an action. While I write I am on the lookout for new ideas or justifications that can tie some things up in a neat bow, or add a twist to the ending. That often is not discovered until late in the writing. Once I know it, I still finish the book (to make sure it all works), but on the second draft, I re-align my characters to make sure they fit (what I now know is) their core-personality traits, at their stage of development in the story. That kind of rewrite can automatically generate some Rewatch Bonuses, and even more if you are willing to tweak the scene to cause them (as I am). Another example of where Rewatch Bonuses abound is when The Ending Changes Everything; as in The Sixth Sense. I _immediately_ rewatched that movie and it was filled with Rewatch Bonuses.