The first one that comes to mind is when I went to a festival last year. Summer Camp in Illinois. I tripped on LSD for the first time the night before and hadn't gotten any sleep before we had to hit the road, so by the time we got there I was going on a day and a half without sleep. Found our camping spot (I was with a friend I hadn't seen in a couple years, his girlfriend, and a couple of his friends) and I set my tent up, and took some more acid. I figured since I took 2 last night I should take at least 4. I dropped I think 6 or 7 tabs. We started coming up and headed back to our tents. It was extremely awkward as I had never met these people. Went to my small tent and tried to organize the shit in my bag, which ended in me breaking the zipper and having shit just scattered around so I gave up. So I'm laying there tripping and thinking about shit til I started bawling. Texted my mom and apologized to her for all the shit I've put her through in my life. Her response was something like "You're an amazing man. People who haven't been through shit often don't appreciate what they have." That made me feel better.
It feels like maybe an hour has gone by and I decide to go explore cause hey, I'm tripping balls and I'm at a festival. Turns out it's been like 4 hours and it's dark out. Left everything but my lighter and half a bottle of water cause I didn't wanna lose everything. Well I got lost, as I didn't bother getting familiar with the place before dropping acid. Ended up wandering around, pretty terrified, from like 9:30 pm til 6 am. At one point I ran into a guy who was in the same boat as me, except he had his phone; it was just dead. We decide to stick together and find his friends - who were right by the entrance. They helped me out with water and cigarettes, so that was nice. When the sun started coming up I quietly headed off to look for my tent again. After about an hour I found it. I actually had walked past it like 5 times. Cried some more (tears of relief this time), took a seroquel and went to sleep.
My thighs were chaffed worse than I've experienced after that, and I had a big ol blood blister between my toes. It was a difficult experience but I felt like I got something positive out of it.