In "The Titan's Curse" by Rick Riordan, Bianca di Angelo reflects on a chilling encounter, recalling the danger she and her friends faced the previous summer. She remembers an attack in a Washington, D.C. alley and mentions an unusual bus driver with ram's horns, which her brother Nico had described. This memory connects the dots for her, highlighting the reality of the threats they have encountered.

Bianca's shiver signifies her unease with these surreal experiences, as she grapples with the presence of mythological beings in her world. The mention of the bus driver emphasizes the struggles they are facing, making it clear that their adventures are fraught with danger and the influence of powerful, supernatural elements.