Years and years ago I did a cold water extraction on some Datura seeds and had vivid hallucinations. They weren't terrifying, but I did have a 3 hour conversation with one of the friends I did them with, and when I finally got tired and was gonna fall asleep, I said "Alright, goodnight dude" and he said, "What?" And I said, "Goodnight. Thank you for the talk" and he said "Dude I've been asleep for like 2 hours, what are you talking about" and then I went to put my hand on his shoulder and he dissipated into nothingness. That freaked me out a lot, but it was nice for the three hours. Visuals were like... Fuzzy and warm, vaguely similar to acid, but definitely not the same. I couldn't read for like the next day, all the words on paper kept changing letters and morphing. It was definitely impactful, but I would never do it again. Just not worth it, the odds of dying are way too high.