10 Horror Movie Characters Who Were Their Own Worst Enemy

Darren Aronofsky, director of this year's sublime human drama The Whale, has a rich history of bringing complex and self-destructive characters to the screen, but few are as much their own worst enemy as Nina Sayers (Natalie Portman), the protagonist of Black Swan.

Leading a production of Tchaikovsky's Swan Lake with the New York City Ballet Company, Nina finds herself competing for and embodying the roles of both the fragile, innocent White Swan and the dark, seductive Black Swan. She finds her opposite in Lily (Mila Kunis), and while for much of the film it would appear that Lily is attempting to sabotage Nina at every turn, not all is as simple as it seems.

Collapsing under the pressure of the production, Nina fails to get enough me-time and goes postal, succumbing to a persecution complex and nightmarish hallucinations of herself, Lily and the creatures from the ballet. Determined, despite her ailing physical and mental health, to complete a perfect performance, Nina pushes and pushes herself, climaxing in a "fight" in which she stabs herself with a large shard of glass from, of all things, her mirror.