The temporary change in personality that occurs after being deeply involved with a movie, book, game, or some other work of fiction.
Can also be expanded to nonfiction ("documentary lag" or some other variant), but is less common because those works are typically experienced through the frame of the reader/player/watcher's default personality.
CHRIS: Don't think. Don't hesitate. Just say it.
ASHLEY: Why are you talking like that?
ASHLEY: You sound like a movie trailer. Is this because you just finished watching Fight Club?
CHRIS: Uhh... yeah I guess I'm a little fiction lagged.
(a) disrespects actual instances of dangerous events the mechanism is designed to prevent, and
(b) causes people who have to monitor uses of that safety mechanism to show skepticism to future uses of that safety mechanism, since the number of serious instances are diluted.
I posted a video critical of this girl's ideology on YouTube, but now all of her supporters are fire alarming me.
Susan believed she had mastered writing due to the grades she earned in high school, but was wrought with existential embarrassment when her self-misconception was brought to light after receiving a C on her first college paper.