I suffer(ed) from Simple Partial Seizures -currently under control by medication. When I was in a bout of getting them (usually a handful a day that resulted in me mostly "spacing out" but not losing any sort of consciousness or awareness, just spacing out for a moment) for some reason my mind would wander to being in an amusement park and just odd, unsettling, feelings about it. Even including vivid dreams I'd have during a spell (I'd get the seizures over the course of a few days then they'd go away for a few weeks) that was just an unsettling feeling inside of an amusement park.
The seizures are now controlled (stopped) by medication but anytime I think about an amusement park or see one in a movie I still get a touch of the uneasy feelings associated with those seizures and when I had them parts of the "amusement park feelings" were centered around Vacation.
So, yeah, I tried watching the movie not too long ago and it was just hard to really watch it towards the end when they arrive at Wally World because I just got too many of those uncomfortable seizure-like feelings.
It's really hard to explain, in fact it took me a year or more to fully explain these "seizures" to doctors to get diagnosed since they were mostly just feelings of "spacing out" for a moment. No convulsions, no loss of consciousness, when having them I was mostly able to still function except for the times when I'd have them and maybe lose my train of thought on the conversation or maybe couldn't find a word I wanted.
But somehow during these moments I'd always get sort of a "forced internal day-dream" centered around being in an amusement park.
Hell, I love the movie Zombieland and I have a hard time watching the climax in the amusement park at the end of that movie but somehow I'm able to do it. (Maybe because the amusement park aspects are more fair/carnival or not as closely related to what the seizures center around.)
Anyway, that's a lot of discussion to un-load that had nothing to do with the topic.
I do think the original vacation is very good, very funny and an 80s classic and I can watch it through just I get an uneasy feeling during the Wall World parts at the end of the movie.
.... Did Clark make his own "Griswald Family Vacation" game cartridge on the family Colecovision?