Agatha came close, mad eyes intent on Dean's face. As soon as she was within reach, Dean bared his teeth and latched onto her wrist.
Agatha screeched. The screwdriver dropped to the floor. She tried to pull free but Dean held on grimly, teeth tearing through her skin and fracturing the wrist bones.
"Damn you! Let - me - go!" Frantic with pain, she raised her free hand and struck Dean on the side of his head.
The force of the blow knocked him loose and sent his chair skidding across the floor to crash against the door.
Dean slumped forward, unconscious.