Yes you absolutely can in some circumstances. Abso-fuckin-lutely. Why would it be transcendental or life changing if you couldn't remember anything? a ++++ is not just being "really fucked up" dude
I find it extremely hard to believe that everyone on this thread has had a true ++++ (you may think you have). Very doubtful, as they are extremely rare. I've known so many people, in reality, who find out what a ++++ is and quickly say they had one because they had a "spiritual experience". A ++++ is when you are elevated to the level of a God and you KNOW KNOW KNOW when you've had one, you'll wake up in hysteric tears. They don't just come regularly or even semi-regularly. I'll be the first to admit that I know I have not had a true one. +3.5, many times. ++++, no, even though i have experimented with high doses and low doses of 100s of RCs and LSD and DMT etc etc etc.
I have heard that ++++s on LSD are somewhat uncommon.
I know I haven't had one because I have seen one. It's not just an intense experience. My friend, after 25mg 4-ACO-DMT IV, definitely had a ++++. He was "out" on my bed during the peak, and when he woke up he was hysterically crying for like six hours, in awe of the beauty. Describes being led to a golden Aztec temple by "living plants", and when he got in the temple he was blinded by white light... Soon things cleared up and he says there were yellow "bird people" flying around him with a "flame-like" energy encompassing the whole temple. He says he found he was able to control the music and the imagery with his head, and he felt the bird people were worshipping him (like it was a ritual for him), said he was elevated to the level of Jesus or Buddha. We have consumed lots of psychedelics for the past 7 years and that is the only one I have seen (besides a crazy 5-meo-dmt experience where someone had to be subdued....not sure if that was or not).