Ok, this is plain weird, hard to explain and absolutely subjective, but I've had some interesting "visions" (mind you, I've never had severe delirium of high fevers in my life, but I can remember some bad nights when I was I child and had big colds.

The main theme of the "nightmare" is one of distance. I can feel enormous distances inside my mind. It's like navigating with the mind without moving (no flying dream), like having a macro and a zoom together, having a sense of hollowness (I made a joke! my head is empty!) and stillness.

One interesting thing is that with a little of effort and depending on my mood, I can feel a very soft version of these sensations when I am in bed trying to sleep.

This is the first time I try to put in words those feelings. As Hal used to say:
"I feel much better now"

Delirium of high fevers, is caused by brainwaves of theta frequency, which are the same ones that your brain generates when in deep sleep, or just falling asleep.

This causes you to have the same experiences you might have in deep sleep, when you are completely awake, though suffering from fever.

From my personal experience i can tell you that the delirium often manifests in things like distortions in object sizes, distortions in distances, inability to command your limbs, inability to express yourself verbally, general hallucinations, feeling of your mouth being stuffed full with a gum-like substance (especially when chewing bubblegum), feelings of levitation or astral projection, paranoia, panic, feelings of falling rapidly (this is very common when you are falling asleep).

If you were to obtain a high fever in order to get high, i would tell you to go ahead, it can be worth it (not to mention you don't have to go to work/school). The thing to remember, is that you can control these hallucinations. If you just throw yourself at the mercy of the hallucinations and go with the flow, you're going to have a 'bad trip', instead try to make the hallucinations work for you, in order to get to a waking state of lucid dreaming.

This method is one of the most effective ones featured in The List of 250 Natural Highs.

I once had a dream like that, only it was of tremendous speeds. I believe I was sick with pneumonia at the time, but I remember other times that it had happened when I was perfectly healthy and right of mind. I would be standing on this track, naught but 10 feet or so wide, and it stretches out to infinity. Sometimes it curves forwards like an apple, but never touching itself, and I never see anything other than the track that I am on; even when it should be visible around me.

I would start out slowly, my feet touching what would be best described as a yellow or gold conveyor belt; someetimes it would even be multicoloured. My speed would gradually increase from zero to what feels like Mach 1, yet I feel no distortion of my body, only the speed. I would end up continuing on this track for what felt like a lifetime, slowing down and believing it was over, just to have it start up again. I would eventually wake, feeling not very rested.

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