For as long as I can remember whenever I'm really sick with the flu or cold and I'm trying to sleep I usually end up having things that I can only call hallucinations or waking dreams. The most recent one happened during the 24 hour halo thing as I was going on 48 hours with maybe 4 hours of sleep.
I would "sleep" for 20 minutes at a time and I kept thinking that my room was actually a forest in a zombie apocalypse. I started off as a lone survivor, but I eventually came to think that someone else was in my room at the foot of my bed because I imagined hearing a sniper round that I assumed killed a zombie. It was all an assumption because during this whole scenario no actual zombies were seen, but I was convinced that was the world. I walked to the bathroom about 4 times during the night and each time I kept thinking about fortifying my fort made of branches, which in the real world consisted of me pulling the covers over my head.
At the time there was no way for me to separate this dream world from reality because I got pissed when my sister entered my room to get something. I believed that she had taken some of my branches and left me exposed to the zombies and the guy with the sniper. I literally had to turn on the computer and watch the halo stream again to snap myself out of it.
I've had similar experiences throughout the years where getting up and opening my eyes would not make the scenario go away. I'd continue to imagine things with my eyes open and closing them only made them more intense. Other people have to have experiences like this right? And in case anyone is wondering this post was brought up by the sleep deprivation talk on the tested octoberkast.