How does Pliny make the ghost scene a dramatic and shocking climax to the story?

Pliny is incredibly good at building suspense in his text through the use of sound and language. For example with capiti catenis, where alliteration of ‘c’ to imitate the sound of the chains rattling. The description of catenis insonabat allows the reader to vividly imagine a stereotypical ghost rattling his chains in a distressing or teasing way. Using the verb 'respicit' at the beginning of the sentence draws attention to action, perhaps highlighting the urgency of the situation.