In "The Last Olympian" by Rick Riordan, the character Dionysus expresses his frustration by proclaiming a curse against a fellow character, threatening to claim their soul. This moment captures Dionysus's dramatic and intense nature as a god, showcasing his emotions in a somewhat humorous context. The response from the other character highlights the surreal and comedic aspect of their interaction, as they point out that Dionysus is threatening a video game character. This exchange demonstrates the blend of mythology and modernity, a hallmark of Riordan's writing, where ancient gods confront contemporary issues and technology in relatable ways.