Sights on the pathway to sleep

Sketch of a form constant, a form of hallucination often seen when drifting off to sleep

Other dreamers may see falling tetrominoes, chess boards, or microscope slides behind their eyelids. I often see text-- apparently of a rambling, nonsensical character akin to the output of random generators, but with formatting resembling that of the books or websites I've been browsing. On a few occasions, I have even seen hypnagogic syntax trees.