"I started from my sleep with horror; a cold dew covered my forehead, my teeth chattered, and every limb became convulsed; when, by the dim and yellow light of the moon . . . I beheld the wretch, the miserable monster whom I had created. . . . His jaws opened, and he muttered some inarticulate sounds, while a grin wrinkled his cheeks (44)."
In this passage, how does Shelley create Gothic horror?