Considering so many other people decided to post about their false-realities of sleep, I decided I'd chip in with this REALLY long and strange dream.  First off, I've had this dream around 14 times in my life, and It occurs at random times.  The last time I had the dream was months ago. Anyhoo, let me begin.
It starts off with me being dropped off at the top of a sandy hill by my mother.  An empty beach is in front of me, and I slide down the hill quickly and happily.  She then drives off (and only comes into the story later).  I run to the water, and then look to my left.  There's a hut there, that wasn't there before.  I enter and see a few furries (Yes, furries) talking and eating ice-cream.  I began to talk to them, but for some reason (I can't remember) they violently rejected me and chased me from the hut.  I ran and ran before getting back to the hill, where my mother's van was sitting atop.  I jumped in and we began to drive down the road...which was like a spiral staircase going down a canyon.  The van jutted and veered off the side of the road and flew twenty 'stories' down into the abyss.  We landed next to a cave, and the rocks from the cave pummeled the vehicle.  We both somehow managed to leave, but the cave was, well, caved in and provided no escape for us.  With no other option, we went forward into the cave.  Suddenly, it lit up, and showed a high-tech lab facility of some sort.  We proceeded, dodging strange traps and contraptions. (Buzzsaws, pendulums, turrets) Then, when we got to the next room, a giant reptilian-like creature sprang upon us (It looked like a DeathClaw from fallout, as I recall).  I quickly ran away in complete fear and managed to escape via a ventilation shaft.  I crawled up to the surface where I saw two biker-looking dudes sitting atop a staircase. I clearly remember that there was a desert in the background, and that it was on a roof.  I managed to sneak by them and exit the building (which wasn't a roof, but more of a single-level ledge...Bah, I dunno.)  I walked over to a rock and knocked on it twice.  A small hole opened up in the rock.  I reached in and pulled a lever that was inside.  The rock lifted itself up as I moved my hand back, revealing a trapdoor.  I opened it up and...
That's when I wake up.
Questions? Comments? Concerns?