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.
Cliffhangers are getting out of control. It used to be that a movie or season would end by wrapping up the story and maybe throw a little teaser in at the end for next season. That’s fine. But it seems like now they just try to stretch out a story or plot for as long as humanly possible.
It has gotten to the point where I will not watch a show until I either know it doesn’t end in a major cliffhanger or the next season is being filmed. Not confirmed, but actively in production.
A good example is Spider-Man: Across the Spider-Verse. I’m still mad about that ending, even more so with the next movie being delayed.