i dunno if i've got the right thing exactly, but whenever i've been really ill i've experienced this mad sensation where you're completely disorientated and very specific things enter your mind, like numbers or words, and you can't think about anything else and it goes on for fucking hours.

it's not a dream, you're awake at times, asleep at others, but you're not in control of your thoughts and can't clear your head.

it's a bit like being really, really high, but not at all pleasant.

anyway, it's mad as a fish on a stick, that.