A flash of lightning illuminated the object, and discovered its shape plainly to me; its gigantic stature, and the deformity of its aspect, more hideous than belongs to humanity, instantly informed that it was the wretch, the filthy daemon to whom I had given life.

– Mary Shelley

Frankenstein, Chapter 7. At the spot where his brother William was murdered, Victor sees the monster illuminated during a lightning storm. His hideousness is reflected by the tempestuous weather.