In Kelley Armstrong's book "Visions," the protagonist experiences an intense emotional reaction, indicative of deep fear or shock. The phrase "My heart seized" suggests a moment of profound distress, where the character feels immobilized by their emotions. The imagery of a "vial of poison" implies that the situation or revelation presented by the other character is dangerous or harmful, evoking a visceral response.
This moment encapsulates the tension in the narrative, highlighting the stakes involved for the protagonist. The character's stare signifies a mix of disbelief and horror, as something potentially hazardous is being presented, leaving readers to ponder the implications of this encounter in the broader context of the story.