How is language used to convey the horror of the ceremony the men perform on Lucy's body?

As with Lucy's description of her out-of-body experience, the imagery of the phallus, penetration, and the orgasm are the three dominant shapers of the scene. Arthur plunges his stake into Lucy's body, driving deeper and deeper with a ferocity that surprises the other men, while the vampire Lucy screams and quivers. Seward records that the body "Shook and quivered and twisted in wild contortions," and afterward Arthur is exhausted from the effort. The language conveys the obvious unnatural horror that Lucy must endure to return to her former (dead) self.