She was screaming at Snape and Snape was first his usual sneering and condescending self but then he screamed back and for some reason somewhere along the way they forgot what they were screaming about. Harrie couldn't for the life of her even remember what words sparked this change but suddenly she heard herself say "bring it on snake boy" and now she was pressed against a cold dungeon wall, her hands pinned to the wall on either side of her head and Snape's knee between her thighs.