Non Sequitur Scene/Comic Books

POW! ZAP! BLAM! No, not that kind of BLAM...the one where you're reading a comic book and then go..."Huh?"

Comic Books

 * Marvel Zombies 3 contains a scene where a superhero named Captain Mexica (who comes from an alternate timeline where the Aztec empire never fell) becomes infected and eats people, as he was a specimen collected for Earth-616. He is eventually cut in half by Machine Man. Of course, no-one ever discusses him before or after his appearances.
 * Of course, you can briefly see Captain Mexica in a flashback to the BLAM a few pages after Morbius starts video taping himself, dunno if that effects its BLAMness or not...
 * Crisis Crossover events that affect unrelated comic series will often result in these for readers of those periphery titles. An Egregious example was in the second arc of New Thunderbolts, when the story gets interrupted in the middle of a battle by House of M so that the series can shift to a story in another reality that is loosely connected to the actual series only by thematic similarities. The recap page of the next issue has the arc's villain, the Purple Man (who had thus far been describing himself as a writer) complaining that his story was interrupted by some bizarre intrusion that had nothing to do with what he had planned.
 * Just as Operation: Zero Tolerance was starting in the X-Men books, Jean is briefly KOed... the beginning of the next issue shows her meeting with Iron Man (who, along with half of the Marvel Universe, was presumed dead but had actually been sucked into a new universe). Before either of them can secure any answers, Jean is pulled back to Marvel 616 proper and this scene is never mentioned again. Word of God says this scene (and a few other power freak-outs Jean experienced) was supposed to have more relevance, but they dropped the plot point completely after the other Heroes returned.
 * Even The Dark Phoenix Saga, the biggest, most talked-about event in X-Men history, isn't free of these...in this case, it's "The Dramatic Debut Of The Dazzler!", wherein Cyclops and Phoenix meet the titular Dazzler thanks to Executive Meddling trying to create a multimedia superhero in the form of an Idol Singer. Although she became a fairly popular character in her own right later, the story of her introduction makes little sense in the larger context of the story being told.
 * The extremely brief mention in Scott Pilgrim that Ramona went to college at the University of Carolina in the Sky, a school that floats in the sky and is tethered to the earth by a giant chain. This is never mentioned again.
 * The Tintin series has a mild one in The Broken Ear. An absent-minded professor leaves his house wearing his wife's overcoat and holding a cane like an umbrella, comes across a parrot, then mistakes it for a person when it speaks. It is a parrot that Tintin is trying to recapture, but there is no interaction with any of the other characters in the story while this vignette is going on, and it adds nothing to advance the story (the parrot has already been shown speaking, so it's not even that). Hergé in his fondness for absent-minded professors probably just wanted to throw in a moment of comic relief.
 * Tentative, as it wasn't used in the final version, but Don Simpson's adaptation of King Kong was originally to include a scene of Kong encountering the Hindenburg during his climb up the Empire State Building, whereupon he punches it out of the sky after becoming "instinctively enraged" at the sight of the Nazi swastikas on it, which is ironic given that Hitler's favourite movie was reportedly King Kong.
 * One happens during Hollis Mason's account of how he became Night Owl in Watchmen. Suddenly we cut to a story about Moe Vernon, the owner of an auto-repair shop who enjoys classical music and collecting tasteless novelty items, usually with a pornographic theme. One day while wearing a pair of fake breasts and listening to Flight of the Valkyries in his office, he receives a letter from his wife informing him that she's been sleeping with Fred Motz, one of his employees who has taken the day off. Moe bursts out of his office wearing the fake breasts, the loud music playing dramatically in the background and bellows "Fred Motz has been having carnal knowledge of my wife." Thinking that it's a huge joke, his employees, including Hollis Mason's father burst out laughing. Moe later commits suicide. Having detailed the event, Hollis just goes back to the one he was telling before. It's a powerful story admittedly but has absolutely bugger all to do with anything.