"Psycho" has become one of the most recognizable films in cinema history, and is arguably Hitchcock's best known film. In his novel, Bloch used an uncommon plot structure: he repeatedly introduced sympathetic protagonists, then killed them off. This played on his reader's expectations of traditional plots, leaving them uncertain and anxious. Hitchcock recognized the effect this approach could have on audiences, and utilized it in his adaptation, killing off Leigh's character at the end of the first act. This daring plot device, coupled with the fact that the character was played by the biggest box-office name in the film, was a shocking turn of events in 1960.