[lightbyte]

That sounds like deliriant hallucinations as opposed to psychedelic hallucinations. Deliriant drugs (such as Nutmeg, DPH, Datura, etc.) produce a completely different hallucination experience compared to psychedelics. Often times after taking these people do not even realize they are hallucinating everything that is happening (conversations, other people, going places) until they suddenly realize they have been simply walking around their bedroom for hours. I imagine these work in completely different ways on your brain.

[sonnyblarney]

Good point - definitely the 'lack of self awareness' is a big differentiator - that said, sensory and cognitive ability is seriously impaired to begin with in these scenarios of sleep deprivation/stress induction.

It's also very scary once you do realize that you've been having a conversation with 'nobody' (or a 'ghost' is what one might think) for quite some time - it adds quite a degree of neuroticism.

On a funny/scary note - the weirdest of all is seeing two people apparently 'having a conversation' ... but upon closer inspection you find they are just taking turns talking near gibberish at one another. All of the manner, body language and tone of a 'conversation' but really, it's just two temporarily crazy people mumbling ... with automatic weapons. Thankfully with no live rounds in most situations :)