Only had one flirtation with this, and I can see both similarities and differences in the reports given here.
A very trusted friend gifted me some, he'd made up three doses for me, my girlfriend and himself. Me and gf were going to a comedy sketch show that afternoon, and friend was going to meet us back at his place. He assured us that there was a long come up on this, so we could drop it when we got to the theatre and be in the tingles when we got back to his. I've had no cause to doubt his fact-checking or measurement on any other occasion, but this turned out to be a massive fuck up. Essentially somewhere along the line he'd given us each the amount he thought we should share between us. As for what this quantity was I still don't know, but given that he usually shoots for the higher end of normal doses I'd guess it was somewhere between 40 and 80mg each...
So we drop the caps, sit down in our seats at a very surreal comedy show. All is good, great in fact, possibly the best comedy I've ever witnessed, my god this song about a beard of bees is so funny... I noticed fellow comedy-appreciators turning round to look at who it was laughing at the top of their voice continuously...
The show was drawing to a close, I'd been totally engrossed but now realised how twisted I was. "We've got to get out of here, get back to the flat". Outside it was a sunny day, cars were hovering along the street, buses muttered under their breath as they passed us by. Gf went into a shop to get a drink and I nearly ran for the hills stood outside on my own, I was anxious to be out in public with this massive growing trip sneaking up on me. Called the friend whose place we were going back to, he could barely hold it together on the phone - "yep, yep, it's really strong, might have given us too much". Gf seemed fine, but I was having trouble engaging with anything outside my own headspace by this point, perhaps an hour in, maybe only 45 minutes.
Got back to the flat and collapsed on the sofa, I think if I'd had my wits about me I would have tried to bring myself down, benzos, anything so I could just curl up in a warm bed and feel safe. However my mind was in a state of absolute confusion and I couldn't take any agency in what was happening. Normally I'm pretty good at feeling 'where my head is at' and taking steps to make things nicer - cup of herbal tea, relaxing music, open the window etc. but all I could do was sit in thrall to the hallucinations. The room was dominated by a large throw on the wall with a circular pattern, its rings were counter-rotating and it loomed out of the wall above my head, oppressing me. Someone put a film on (no idea what) but it was full of secret subtext meant for me, really negative delusions building up around it.
I remained stuck in this muddled and negative space for an hour? Two hours? At last the fog lifted enough for me to take a bit of charge of things, realise I was feeling rubbish, and use the little edge of initiative I'd gained to take the three of us out for walk to sit on the hill. As we left the flat the relief was incredible, orgasmic. I was too drained to leap for joy but I was so happy just to sit outside in the warm evening air and watch the sun go down. My visual perception was still extremely distorted, and I was not in the mood to really enjoy that, but it no longer mattered.
Never that good an advertisement to say 'the best bit was when it wore off', but I think at a lower dose I may have had an opportunity to enjoy this! While it wasn't 'fun' there also wasn't much chance to do any useful or interesting thinking, my mind was so scattered and impaired, but not fully cut adrift like on large amounts of LSD. Had me really worried that I'd damaged myself, and I felt a bit shaky for a couple of days despite not being a truly Bad Trip.