I assume I do not need to explain to you the possible consequences of your actions," Snape began, after several moments of silence has passed between them since Harry had arrived in his quarters.
From where he sat perched on the edge of the sofa, Harry shook his head, eyes glued to the floor.
Another pause.
"Have you nothing to say for yourself?" his guardian pressed, sitting in his armchair by the fire.
"'M'sorry," Harry mumbled.
Severus sighed impatiently. "Not nearly good enough. Whose bright idea was it then?"
Harry hesitated.