The excerpt reflects a sense of urgency and frustration from the character Slothrop, who is experiencing a chaotic mix of emotions and demands. The mention of "re-enlist" suggests a military context where individuals are being called upon to fulfill their duties, despite their inner turmoil. The phrase "ruptured duck" symbolizes a longing for recognition or validation amidst the overwhelming nature of their circumstances.
As the narrative progresses, it becomes clear that Slothrop feels misunderstood and disconnected from those around him. The imagery of tapping the head and injecting with a needle conveys a desperate need for relief, likely from the pressures of war and societal expectations. The repetitive urging to "snap to" highlights the relentless push for conformity and responsiveness in an environment that lacks genuine understanding or empathy.