Forbidden Journey might have the silliest "plot" of any ride. You play the role of a muggle and for some reason Hogwarts is letting you tour the place and attend a lecture. Harry, Ron, and Hermione think that you'd rather attend their Quidditch game, so they tell you to meet them in the Room of Requirement. There, you board an enchanted bench which is supposed to magically follow Harry.
Instead, you immediately get attacked by a dragon that Hagrid accidentally let loose. Harry and Ron are aware that the dragon attacked you but head to the Quidditch game anyway. Hermione saves you by guiding you from the Forbidden Forest back to the Quidditch Pitch using astral projection or something.
You arrive at the Quidditch game which is well in progress. Harry asks, "Where have you been??" Even though he literally just saw us get attacked by the dragon and abandoned us.
Dementors appear at the Quidditch game which is extremely random and nonsensical and would be a very huge deal for Hogwarts but is sort of treated as just a common annoyance. You crash into the Chamber of Secrets. In this very short time Harry managed to finish and win the Quidditch game (apparently saving you wasn't top priority for him or the rest of the school), race over, find you, and return to the school.
Upon returning, Harry thanks us and says we were brilliant even though we didn't do anything and us getting into trouble was kind of his fault in the first place.
I still love it though.