The scene illustrates a moment of unexpected levity amidst a dark scenario involving death. The laughter shared between the characters suggests a fleeting escape from their grim reality, highlighting how humor can arise even in challenging situations. The environment of the train adds to the surreal quality of the moment, as movement contrasts with the stillness typically associated with death.

The phrase emphasizes the interconnectedness of life and death, as even the dead man's presence seems to echo their laughter. It raises questions about the nature of existence and how individuals cope with their circumstances, as laughter serves as both a release and a poignant reminder of loss. Through this interaction, Thompson captures the complexity of human emotions in dire situations.