Though there have been a few laughs before, and the true climax of the book will come at the end of chapter 47, this is the turning point of the story: it will provide Charles Halloway with the key to defeat the dark carnival.
In short 2002 interview excerpt at the conclusion of their exhaustive study, Ray Bradbury: The Life of Fiction, Jonathan R. Eller and William F. Touponce asked the author about the significance of laughter in Something Wicked This Way Comes and his work in general. He responded, in part:
"Laughter is the best answer to everything. ... during my last three years, after my stroke, I learned that truth. There comes a point when your frailties assail you. When you can't walk well enough, your arm doesn't work, you can't speak very well, and then you suddenly say, 'This is very funny.' You've either got to laugh at it, or you are destroyed by it. ... the time comes, finally, maybe when you're lying in bed late at night, you add up all these things and you say, 'You know, that's ridiculous! That's really ridiculous!' That you would let all these stupid things -- they're very serious when they happen one by one -- but when you add them all up, it's ridiculous. Sure you have days when you are not happy, but the Great Laugh is the cleanser."