I've been to pride parades straighter than Jules Verne's Twenty Thousand Leagues Under the Sea, and as much as I'm joking, the tonal shift in the first half of the book when Arronax and co get yanked into the Nautilus never fails to kill me.
You get kidnapped and dragged into the pitch black belly of an enormous submarine that, until recently, you figured was an impossibly massive animal that has had run-ins with ocean vessels and crippled the ship that was supposed to hunt it. This was all after after nearly drowning at sea in the dark. You are confined in a room with a singular meal in your stomach as one of the fellow guys you are kidnapped with attempts to strangle one of your captors, who you think doesn't speak any of your known languages.
All of the potential damage from those incidents seems to be reversed and your attitude does a 180 when you're told, of all things, by the commander of the vessel (who's the finest human specimen you've ever seen btw) that you cannot leave, but that you are welcome to be free onboard as you wish. The guy personally wines and dines you, intricately explains his ship, appeals to your love of research, says that he has YOUR books as some of his favorites, and shows off the ins and outs of his miracle of engineering, and you're talking him up like he's the greatest guy around and that everything is peachy as if, again, you didn't just get the deep sea version of Beauty and the Beast'd and that your ass is NOT ever seeing your friends, family, country, work, or just about anything above water ever again.
But yeah man. Finest guy you've ever seen with striking eyes and stunning intellect and incredible engineering prowess, and you can't help but feel as if something horrible has befallen him in his past (he kidnapped you and said you had a life or death choice). He's got a massive library that you can roll around in and a collection of humanity's priceless art, as well as big ass collections of sea specimens (he literally kidnapped you lock in). His quarters share a wall with yours. He gets shoulder to shoulder with you going over the schematics of his ship and everything's smooth as buttercream as if, again, you weren't just given a life sentence away from the entirety of humanity like 20 minutes ago, but whatever floats your Nautilus I guess.