"[facing Severus Snape in the Great Hall, coldly] It seems despite your exhaustive defensive strategies, you still have a bit of a security problem, Headmaster. [The members of the Order of the Phoenix enter the Great Hall] I'm afraid it's quite extensive. How dare you stand where he stood? Tell them how it happened that night! Tell them how you looked him in the eye, a man who trusted you, and killed him! Tell them!"