In the book "Apollyon" by Jennifer L. Armentrout, an extraordinary event is described humorously, comparing the unbelievable to pigs flying. This phrase evokes a sense of disbelief at something highly implausible happening, suggesting that the characters or events faced challenges that seem insurmountable or fantastical. It highlights moments where reality defies expectations, emphasizing the unpredictable nature of the storyline.

The imagery of pigs sprouting wings encapsulates the surreal tone of the narrative, indicating that the characters are encountering situations that are out of the ordinary. This whimsical description serves to engage readers, drawing them into a world where the impossible becomes possible, setting the stage for thrilling developments in the plot.