Yeah, it's basically the "dialed up to 11" kind for me too. It's okay if the dialed-up events are in the past -- like, someone having a nightmare and opening up about a horribly traumatic thing that happened to them 5 years ago totally does it. And even the gentle "having a bad day and someone being nice to them" thing can do it for me, but usually there needs to be a subtext of "... but no one is EVER nice to them like this and they think they don't deserve it and they're so SHOCKED that anyone would".

Everyone needs to write altitude sickness; we need to make it a thing. :D (I did write it once so far in my current fandom, which was what made me realize that I've never seen anyone else do it prior to that. WHY IS IT NOT A THING. It's such good h/c.)