Scream Bloody Murder

As his father works on a tractor, young Matthew turns it on and kills him with it, damaging his own left hand in the process. Matthew is subsequently placed in a psychiatric hospital, and his mangled limb is replaced with a hook. At the age of eighteen, Matthew is released from the asylum, and returns home, discovering that in his absence his mother has married a neighbor named Mack Parsons. Matthew, who harbors Oedipus complex for his mother despite his aversion to sex, dislikes Parsons, and one night he murders him with an axe. Matthew's mother discovers what her son has done, and when an argument breaks out between them, Matthew knocks her to the ground, and she dies due to hitting her head on a rock.