In Quills, why did the one prisoner break through the wall to kill Madeleine when she was writing the stories?

Answer 1

because the story was really erotic.. he was turned on...he was insane and violent..., and in the story madeline was reading, a woman was killed and raped... so, as she was reading, he got more and more turned on, he got all excited about the fire, he was even more excited about the violent and sexual nature of the story- and then he was given the opportunity to break through and act out the story...