Mary Grace should probably stop sticking her hands and fingers in inadvisable places during times of peril. Unfortunately, she already swore never to learn anything ever again, and that includes this lesson.

As she tries to tug her finger free, Mary Grace throws the rope around her waist to the others, then just hucks her History of Magic book with her left hand. If it hits Presley or mushroom girl (Something Something Winter???), then, you know, whatever.