I still remember it vividly now, I took exhausting notes during the process - notes that I thought were full of pure spiritual brilliance - and which turned out to be mostly mad gibberish in the end.
Among other things there were a few days that I spent convinced that I was a character in a video game and I had to make sure that the game was "entertaining" or else the "player" would "switch it off".
Some things were downright Lovecraftian in nature. Reading his stuff now, I'm pretty sure that a lot of his stories were inspired by his own mental trips. ie, one of my favorites: http://www.hplovecraft.com/writings/texts/fiction/hy.aspx
But mostly it was full of that exhilarating rush of being connected to some hidden truth that no one else has access to. I can see why it's hard for people to just walk away from that when those visions feel so meaningful at the time.
Anyway, well done for recovering! I guess a lot of people don't, which is quite a disturbing thought - being stuck in that mental state forever - so that makes us quite lucky.