"Don’t think this is over, Potter," Riddle said silkily, voice sounding right next to Harry’s ear. He flinched and looked back over his shoulder. Riddle was leaning against the wall, having moved just far enough to show he’d escaped Harry’s jinx and was choosing not to pursue him. Harry quickened his pace further, and scrubbed his hand over his ear, trying to wipe the feel of Riddle’s whisper away.