I have tried 4-ACO-DMT many times. Each has been very enjoyable, but usually fairly mild. I started off with 20 mg, each time, and then gradually went up from there, but trying 30, then 40, and then eventually 50. I recently tried 75. i felt like my body was incredibly heavy, and I felt very weak. Although I did enjoy the experience, I felt that maybe something had gone wrong with the batch maybe, as my fellow psychnaut colleague, took 30, and said that he felt abnormally heavy, and tired as well. I sort of past out about five hours into the experience, (from laying in my bed, not falling out while standing or anything) and felt incredibly heavy when I woke about three hours later. I didn't have a huge headache or anything, but I felt a considerable amount of pressure in my head, that is still lingering as I type, but not as bad, as I have taken a couple IB Profen. Has anyone else ever had an experience like this before with ACO? Needless to say, I have a lot more respect for the compound.
I've been witness to someone blacking out on mushrooms, so I think you'll be alright. I've only taken 4 aco dmt a couple times myself and not at heavy dose ranges, the most I've physically felt is a slight weighed down feeling, slightly off coordination.
With increased dose usually things like physical effects (heaviness) get more pronounced, although with some psychedelics this is not necessarily the case. Unlike most other drugs, Psychedelics tend to have variable reactions among different people, so I can't say that it's 'normal' necessarily. 4-aco-dmt has a steep dose/response curve meaning increasing the dose even a few mgs can cause major changes in a person's experience. So for some people going from a dose of like 25 mgs to 30 mgs can feel twice as more potent while for others they may not even notice a difference between the two doses. Set and setting play a major role as with all psychedelics.
On the subject, I have a friend who blacked out twice out of the three times he has taken LSD, so it's not 4 Aces. That wasn't much fun trying to catch a 15 stone guy tripping my ass off