"An odd place to meet --" To Harry's immense disquiet, Snape's black eyes flicked to the doorways on either side of them, and then to the one-eyed witch. "We're not -- meeting here," said Harry. "We just -- met here." "Indeed?" said Snape. "You have a habit of turning up in unexpected places, Potter, and you are very rarely there for no good reason. ... I suggest the pair of you return to Gryffindor Tower, where you belong."