Wow, that was one hell of a presumptuous Ginny. Good thing Snape was around to help protect Harry, even if it was from himself! I adore scorpion!Snape and his thoughts to himself.
The discussion between Snape and Draco was priceless, especially Draco's description of the Weasley women and Snape's concern over who Draco's slept with.
The best line, however, was Harry's last. It was priceless.