Knowing this and that AI is so good at creating nightmarish pictures, would it be possible to attempt a reverse? Ask/learn AI to create the most frightening, most nightmarish rendering it can ever produce?

Is such picture even exist? That I would seen it once and wouldn't sleep for a week? Or upon seeing it, start crying without explanation?

Seeing something like this created by AI would be very impressive: "prepare to cry when you see this picture (guaranteed!)"