The central theme of the story is Fear.
Initially, Hudson had looked forward to riding the roller coaster. See Paragraph 1.
On getting to the Six Flags of Great America, Hudson sees the roller coaster (Twisted Twister), and gets nervous about its height and movement See Paragraph 10.
By paragraph 20, Hudson had run away leaving his friends behind. He was too afraid to do it.
Learn more about themes in the link below:
https://brainly.com/question/11600913