When I was in high school, I heard this thing about getting "high" through blood pressure and oxygen manipulation. The technique (don't try at home):
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Be seated.
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Actively hyperventilate for 30s. Deeeeep breaths.
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Stand up quickly.
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Immediately stick thumb in mouth with full lungs and attempt to blow air out as hard as possible without actually letting any out.
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That's it. That's the whole thing.
So, feeling dubious, I tried it while hanging out with some friends. I stand up, do the thing, and in <5s boom. Dreamland. I had what felt like a full 6-hour experience, semi-lucid dreaming. I had some control and awareness that I was dreaming, flew around some giant yellow and pink mushrooms. I dont remember any other details at this point, but it was a whole day pretty much.
Wake up to my head hitting my buddy's guitar. I somehow had an hours-long experience in the time it took for me to pass out and hit the ground. Haven't done it since, but man, I don't think I'll ever forget that. One hell of a ride.
