This one night I ripped 2 bowls of funk in a waterfall, by myself.
I was so high that it felt like (or I thought at the time) that the bones in my body were twisting and cracking (I could 'hear' it in my mind). It was very freaky so I went to bed after a while to try to sleep, so I wouldn't have to focus on the ridiculous high, which I was not enjoying as usual (since it is never like this.. I was just blazed out of my mind to no extent).
Laying in bed, I couldn't sleep, and I kept thinking about everything that clicked into my mind very deeply. I had myself convinced that my bones were actually doing what I thought, and I thought that I was the only one on Earth with some new bone disease. I was really fucking convinced, cause I was so high, and I will admit that it was frightening. These thoughts freaked me out, but I eventually got over it and fell asleep, waking up completely fine the next day.
This is the highest I have ever been, and it was absolutely insane! (not in a good way though)
Thankfully, I have never had this experience again while high.