He forces it back into its original body , an adult catatonic mental patient , hoping the mental hospital staff have the means to contain the abused man 's pain .
With help from the possessed boy 's mother , John succeeds in exorcising the spirit .
John forces it back into its original body , an adult catatonic mental patient , hoping the mental hospital staff have the means to contain the abused man 's pain .
With help from the possessed boy 's mother , John succeeds in exorcising the spirit .