What Happened to the Mouse?/Web Original


 * From "Swimming!", an early episode of Lonelygirl15: "Whatever happened to that girl, Cassie?" Over 430 episodes later, we're still none the wiser.
 * The White Parade has a variation of this. Part III sees Ean sending Allys on an errand to fetch a sandwich from the Subway across the street from the hospital where he's staying... only for it to never be mentioned again once it's retrieved.
 * This strange youtube video takes this trope quite literally. It features an animated mouse who just walks across the screen and then is never seen again.
 * The Literal Music Video for Anything For Love has Meat Loaf continue to complain about his dropped necklace long after it stops being relevant to the video's plot.
 * In Kung Tai Ted's review for Tiger Love, Ted becomes so disturbed at the scene where the titular tiger mauls a boy that he breaks character and asks if the child actor actually got killed.
 * The interstitial webisodes aired prior to The Walking Dead's second-season premiere revolved around a survivor named Hannah and her attempts to protect her family from walkers. At the end of the webisodes, Hannah (running to escape the city with her kids) manages to kill a zombie that bites her, and tells her children to run away as fast as they can before she turns. We see what happens to Hannah afterwards (she's eaten by a horde of walkers, and becomes the titular "bicycle girl" that Rick Grimes discovers in the pilot episode), but what happened to her kids?
 * The Nostalgia Critic invokes this trope with his "but what happened to Boomer?" rants in various movie reviews, everytime a character's fate, especially if it was a dog, is not resolved in a movie, at least for a while. If it is before the end credits roll, a short "Boomer will live!" scene is shown. Boomer was a pet dog in one of the reviewed movies.