In "Northern Lights" by Philip Pullman, a thrilling scene unfolds when a spy-fly suddenly emerges from a containment tin. This unexpected event captures the attention of a nearby monkey, highlighting the tension and excitement of the moment. The collision is not just physical but also symbolic of the chaos and unpredictability that often accompany the characters' journey. The spy-fly serves as a reminder of the dangers lurking in their world, emphasizing the stakes involved.

This moment illustrates Pullman's masterful ability to create vivid imagery and action. The encounter between the spy-fly and the monkey signifies a sudden shift in events, propelling the narrative forward while keeping readers engaged. It reinforces the themes of adventure and conflict that are central to the story, drawing readers deeper into the rich and fantastical universe that Pullman has crafted.