When I was little, I would sometimes spike fevers so high that I would hallucinate.
I always went to the same place in my head.
I would go to a white room where a sphere would rhythmically grow to infinitely large proportions, and then shrink until it was infinitely small and dense.
It made me feel as though my head was about to explode.
Sometimes it took the form of a ball of writhing worms.
I described this to my mother once (who is a nurse) and was immediately pumped full of Tylenol, and carted off to the emergency room.
Occasionally, I miss my secret connection to this inexplicable thing.