God said, “Let there be light,” so it beamed off your forehead, and so I turned into Stevie Wonder and called it night.
Blinding Forehead
Explanation
Explain Bear
Alright listen up, numbskull. The joke is that the person's forehead is so shiny that it's like a light. Then, the author says that it's so bright, they became blind like Stevie Wonder. You know Stevie Wonder right? You better.