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.
I’m sure it been said already but:
The villain who wanted to change society for the better but took it too far (which invariably involves just doing something randomly evil with the implication that their criticisms are now invalidated)
Oh boy, another excuse to link this article!
The Swerve