Draco's tongue rolls in her mouth as he takes a step back; instead of keeping eye contact with her, he's looking beyond her figure, peering at the novel she was keen on discovering before he arrived. She notices the change in his persona; it sweeps through his features as they grow tight. His body turns stiff, and it's almost as if she is staring at a sculpture. The rage is falling from his body in large wavelengths, and she doesn't know what's made him so upset.