Many years ago I tried LSD, and for whatever reason, I never seemed to experience visual hallucinations.
However, in recent years, cars have started having LED tail lights, which really bother my eyes.
Several times I have asked my friends, "Aren't those terrible!?" to which they might reply, "They are pretty bright."
Bright! They aren't just too bright, they are intensely STROBING! Can normal people not see that? Is this the flashback I was promised?