In "Full Dark House," Christopher Fowler vividly describes plastic carrier bags caught in the flow of urban life. These bags, resembling jellyfish, drift aimlessly around traffic lights, illustrating the pervasive nature of litter in the city. This striking imagery emphasizes how even simple items can evoke a sense of looming danger as they mingle with the hustle and bustle of daily routines.

The comparison of the bags to predatory jellyfish not only highlights their omnipresence but also evokes feelings of unease. In a broader sense, this scene reflects society's environmental challenges, reminding readers of the consequences of plastic waste. Fowler's writing here captures a moment that resonates with themes of urban decay and ecological awareness.