Ah, the cephalopods. Yes they do seem to crop up a lot for people, particularly with DMT and mushrooms it seems, but definitely on other psychedelics too. They are amazing critters I think.
The only entity I have so far encountered was an octopus on some Syrian rue and Hawaiian Panaeolus cyanescens mushrooms. It suddenly appeared from this mass of patterns and fractals...it was a very vivid encounter, it was anatomically very similar to our octopuses, if a little more alien, it was 3D, humming with bioluminescent electric blue and pink colours, and it was checking me out with one eye peering at me (I later learned this is how octopuses tend to observe things). It seemed to attempt communication by spurting out fractals and patterns at me like psychedelic ink as it ectoplasmed up the wall, before dissolving back from whence it came. My friend had his own encounter. We each vaped DMT in the woods one beautiful summer's day while on LSD at the time, a beautiful spot under some trees by a stream. We both figured out the power of vocalising and how this could modulate the DMT state on this occasion. My friend went first, and I followed. Right after he blasted off, he said this huge interdimensional cuttlefish came and enveloped him its tentacles. My friend was quite freaked out by this! But the cuttlefish made it clear telepathically that it came in peace and was merely curious and didn't mean him any harm. So he relaxed and began throat singing, I did the same and noticed an incredible blissful expansion and deepening of the LSDMT state.
Quote:I found myself in a bare white room with the octopus on a modern aluminium truss stage in front of me.
This caught my interest too. During my one big DMT breakthrough, I ended up in this room, a room that was eerily familiar, and mundane, "real", and decidedly non-psychedelic...i.e. it was very reminiscent of somewhere in this physical reality. It was a bare, mostly white room like you describe...it reminded me of somewhere between a lab and a kitchen. It was clean, sterile and bare. I don't think I was there for long, and do not recall encountering any beings there. Interestingly, this is an environment that other DMT explorers seem to encounter, or at least others similar to this, which I find intriguing.
I can't say I've ever experienced anything implant related, but this is a common things reported in association with alien abduction reports, which do seem to share some experiential overlap with DMT trips, and OBE's. It felt like I was about to be abducted at the blast off of my breakthrough DMT experience.