It's a good thing you came out of it. Some people don't. Then they have one of those instrospective nightmares. A living hell that lasts for four hours plus. At a rave once I did two hits of acid and some X. It was my second time candyflippin and I was sitting down when my friend Henry came up and offered me a booster E pill. I accepted it without thinking and gobbled it down. Mistake. I had one of those little glowsticks in my mouth as well and down the hatch that went with the E pill. My heart skipped a beat. I was convinced that I had done too much, done too much. My head kind of heated up because of my sudden fear and I became convinced that my stomach acids would erode the plastic of the glowstick and that the glowstick chemicals were going to poison my brain, and the heat I was feeling was the poison. Now all I could do was wait to die.
Luckily some friends recognized my paranoia and we went inside and danced in the trance room. I totally forgot about my fears for a while and now it is almost impossible for me to trip badly, for the notion that "this is not real" is permanently instilled in my mind. Peace.
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Rational thought is interpretation according to a scheme which we cannot control.