Complex sentence: After he recovers he discovers that he has developed increased strength, later that night Stephanie is attacked and almost raped by man until Quentin intervenes and kills the man by punching him through a door and leaves before Stephanie can see him.
Split into simpler sentences: After he recovers he discovers that he has developed increased strength. Later that night, Stephanie is attacked and almost raped until Quentin intervenes and kills the man by punching him through a door, leaving before Stephanie can see him.