Gradually, Snape went very still, his eyes flicking between Harry’s eyes and his bare neck, "Did this have anything to do with the events that resulted in the headmaster leaving the school?" Harry kept his mouth firmly shut; though he was usually only vaguely aware of his occlumency shields, at that moment that felt like a "DO NOT ENTER’ sign in the periphery of his vision, "Did this have something to do with Professor Umbridge or the disappearance of Vincent Crabbe?" Snape continued, his voice dangerously low now. Harry couldn’t help the slight reaction at the mention of Crabbe, curiosity clawing at his gut, but Snape seemed to interpret his slight shift as a response to the mention of Umbridge, "Potter - you must tell me: did Professor Umbridge use an unforgivable curse that night?"