Unfortunately for Fenris, Sandie wasn't taken in by the wolf's feint.  He made to go left, then rushed her, and when he got close enough, she reacted...  Using his momentum against him, she gripped his waist when he was close enough, her knees bending and her body dropping back.  He was rushing forward, so all she had to do was lift her arm a little, and use her elbow to drive his head into the ground.  It was almost like a wrestling move.