I'm a month late but to this post but I just wanted to say that this is what forced me to quit smoking. I had a couple of horrifying experiences and now I get panic attacks just being around people while they're smoking. I miss getting high as fuck and having a good time. It also sucks because it became legal in my state a few months after I quit.
I've had this happen and I've been with my husband when he's had it happen, it's a pretty weird feeling, but I rather enjoyed it. It felt cool, like being in science fiction something or other.
I mean I was happy for my brain and body to feel reconnected, but I didn't mind the experience while it lasted.
Dunno if it would count as depersonalisation or derealisation but I've had out of body experiences a couple of times when I've had too much. But I've also tripped when super high (too high).
I have a weird metabolism so my highs are really variable no matter how careful I am with amounts and method. Meaning I regularly end up orbiting the moon by accident. Have had some interesting trips.
I don't ever recommend being super sick, taking melatonin and weed. My dreams were really fucking weird and I slept like shit to boot lol.
I think I've become more practised at dealing with having to much as a result and my biggest takeaway is to surrender to the experience, remind yourself that it will wear off, and mindfully embrace the experience and how you're feeling, be really in the moment.