In "Big Money" by P.G. Wodehouse, there is a vivid metaphor that likens a character's discomfort to that of Prometheus, the figure from Greek mythology who was punished by Zeus. The imagery evokes the intense suffering faced by Prometheus as he endures the relentless torment from a vulture. This comparison highlights the character's pain and sense of helplessness in a humorous and exaggerated manner typical of Wodehouse's writing style.

The groan and wince reflect a moment of vulnerability, suggesting that the character is dealing with an overwhelming situation akin to enduring an ongoing punishment. Wodehouse uses this metaphor not only to convey physical distress but also to emphasize the folly of the character's plight, adding a comedic touch to the narrative. Such literary devices enrich the story, providing depth while keeping the tone light-hearted.