I’ll go first. Mine is the instant knockout drug. Like Dexter’s intramuscular injection that causes someone to immediately lose consciousness. Or in the movie Split where there’s the aerosol spray in your face that makes you instantly unconscious. Or pretty much any time someone uses chloroform.
My pet peeve is that screenwriters, directors, and producers know and recognize even more tropes than we do. Somewhere along the line, things were rushed and/or lazy. Someone just said “aw, fuck it.”
If the filmmakers don’t give a shit about the final product, why should I?