I just wanted to know if you know what the word "stories" mean when it is related to roller coasters.
I looked up on several dictionaries online but no answers. Thanks for your help.
In AmE, "stories" (not "storeys") can refer to the height of the roller coaster. (We use "stories" when referring to the different levels of a tall building.)
Right, so a roller coaster with "a sudden, four-story drop" means that you go down suddenly a distance that is equivalent to the height of a four-story building.
Could it not be that the roller coaster is meant to describe the story; a narrative that is exciting and goes up and down, changing suddenly from one thing to the next?