I've Never Had a Acid Flashback, but I Don't Know What Kind of Dosage They Were Giving People

I've never had a flash back. I did at one point. But it's not like, my guesses they got. And i think i definitely have seen enough reports that would see acid flashbacks defntly actually being a thing in some cases especially. The local postman was doing his rounds on his bicycle when he was suddenly overwhelmed by nausea and wild hallucinations. Quoting him: "I had the sense of shrinking and shrinking and fire and the serpents coiling around my arms"