In "The Battle of the Labyrinth," a humorous moment occurs when a character reassures another with the quote, "Don't worry, goat boy. The milkman is dead." This line reflects the playful and sometimes absurd nature of the interactions among the characters, highlighting their unique relationships and the light-hearted camaraderie that exists amidst their challenges.

This quote also serves to lighten the mood in the midst of the story's tension, showcasing author Rick Riordan's talent for blending humor with fantasy. The interplay between the characters not only deepens their bonds but also provides a necessary comic relief during their perilous journey.