Erika expresses this latent violence as well and need for control in many other scenes throughout the book. Erika takes large instruments on trains so that she can hit people with them and call it an accident, or kicks or steps on the feet of other passengers so that she can watch them blame someone else. She is a voyeur who frequents peep shows, and on one occasion catches a couple having sex in a park, being so affected that she urinates. Childhood memories are retold throughout the novel and their effects on the present suggested—for instance, the memory of a childhood visit from her cousin, an attractive and athletic young man, whom Erika's mother praised while she makes her daughter practice piano, results in Erika's self-mutilation.