On Mixing Genres and Breaking Writing Conventions

https://www.writersdigest.com/writing-articles/by-writing-goal/get-published-sell-my-work/the-dos-and-donts-of-combining-genres

https://www.servicescape.com/blog/144-genres-and-subgenres-for-fiction-writing

Mixing genres and breaking writing conventions is the best way to produce something fresh.

The easiest way to write a memorable scene would be to break a genre or writing convention or cliche. Some of the obvious examples are:
- Psycho and recently Cop Cam - killing off the main character early to mid way through the story.
-Quentin Tarantino breaks numerous writing rules in his movies. Writing rule #1: keep your scenes short as possible. In Inglorious Basterds, he famously breaks this with the looooong milk intro scene, and the meeting scene in the basement. Writing rule #2: Show character through their actions. Quentin prefers to show his character through extended dialogue e.g. Reservoir Dogs opening discussion on Madonna's song Like a Virgin and tipping etiquette, Jules in Pulp Fiction with his many famous conversations (Say what again! Royale with Cheese, Ezekiel 25:17). He breaks the heist genre convention in Reservoir dogs by not showing the actual heist. I'm sure there are a lot more...
- Se7en (SPOILERS - lol) - is probably the best and most memorable example of breaking genre conventions. The two detectives does not catch the killer. Instead Andrew Walker has John Doe walking into the police precinct, covered with blood, screaming for the detectives attention, before handing himself over. This also changes the story from a who dunnit to why dunnit and where are the last two bodies (car ride scene). Then in the climax we have one of the good guys killing the villain out of rage, instead of the usual self protection. This completes John Doe's seven deadly sin masterpiece and the bad guy wins :(
-Memento and Irreversible - events shown in reverse.
-Nolan playing with time - scenes from Inception, Interstellar, Dunkirk etc.