A couple weeks ago I was on acid around campus and saw one of the weirdest things I've ever seen.
A sprinkler had malfunctioned, and had started spraying water while still underground. It had presumably been doing that for a good hour or so, because the water had built up underneath the grass. The layer of grass was bulging up over the ground. It looked exactly like a water bed.
You can imagine what this might be like to someone who is on 5 tabs of acid. I couldn't tell if it was real or just a very intense hallucination. I even saw people walking over to it and jumping on it!
Anyway, that was my oddest moment while tripping ever.
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