Most intense ever, was quite unexpected. I had 2 tabs of acid over the course of the day, and as that was wearing off enough that we got bored, we decided to have some Ketamine.
We put half a gram in a shotglass full of water, and 2 of us had one shot each. Given that I can normally handle a whole lot more than .5g of K in a sitting I didn't think it would be too rough a ride.... wrong.
After about 15 minutes or so my trip started to come back on, far more intense than it had been (and more intense than I have EVER experienced off acid), and just continued to climb. Got too intense for my tripping buddy who we basically had to sedate to calm down while we kept reminding him who he was, who we were and that he was safe.
The whole experience lasted several hours, and was far and away the most intense drug experience ever.
Those who know me know I usually push myself pretty damn hard to see how far I can go. Despite best efforts I have never managed to dig myself a K hole. Up until this day had never had full hallucinations off acid (as in actually seeing things that don't exist, not just morphing and patterns). This combo had me off to a place I've never even come close to before, even when I have had more of both acid and K together before and since, I can only figure it had something to do with the rate of absorbtion due to ingesting a liquid (and all at once) rather than snorting.
So in summary...
Acid and
.5g of K in 30mls of water. Definately not for the faint of heart. (Although I plan to do it again sometime when I don't have to worry about my tripping buddy

)