I had my first high dose LSD experience on sunday, and I was blown away. Took 6 hits of some VERY good blotter at 6:00 with a bunch of friends and a capable sitter over at a nature reserve. At my peak, my creative, associative, and metaphoric thinking abilities were elevated to a level I have never before experienced.
Insight after insight into life, the universe, and myself just flowed into me as if my mind had awoken for the first time in my life. I began talking with one of my friends who was tripping 4.5 hits of the same blotter about the nature of sentience and perception, and within a minute of our discussion, the sitter said something along the lines of "Holy shit guys! Hold on, I need to record this; this is incredible!". Upon viewing the recording, some of the concepts we were discussing proved to be a little abstract for the sober mind, but between the two of us we made so many incredibly good, insightful points that we are actually now collaborating on a paper on the subject.
I feel like the high-dose acid trip enabled me to experience a truly transcendental level of insight; in many respects a much higher cognitive plane than I had ever thought possible. Is this a common phenomenon? I certainly have never felt anything like it on mushrooms, lower doses of LSD, or any other psychedelic for that matter.
Also, darkness and quiet on a dose of LSD this high (500+ ug?) allowed me to slip out of my physical existence entirely. I forgot that I was even a human being at all, although I have experienced this on other psychedelics, particularly with higher-dose Mushroom + DXM combinations. Well that's my story. I am definitely going to be repeating this in the future-- might even try a ten-strip if I have a perfect set and setting and sitter as I did this weekend.