Maybe they visit a parallel universe where they meet insects.
Funny how most in this thread are unwilling to interpret the experience at face value, probably because of certain taboos among scientific and technically minded types.
Knowledge brings biases, of course. But those biases aren't necessarily wrong.
You have a blind-spot (at least one) on each retina that you never see. Does this mean that there is a secret hole in reality, just out of sight, that science won't accept? Or does it mean that there's an area on your retina with no visual sensors, and that the brain fills in the gaps?