I had this great dream the other night.
I was watching the nightly news. They were telling us about some ancient script they discovered and deciphered, and they were going to read it live.
Then the dream cut to about 10,000 BCE, where some evil shaman had tricked his tribe into performing an ancient rite of great evil. When the ritual was over, some giant, evil creature rose from the waters (like Cthulu) and started killing everyone. It also had a "corrupting" effect; everything around it started turning into little demons just like it.
A D&D adventuring party showed up. The elf shot a few arrows at it; when the arrows did nothing, the Fighter said "Screw this!" and they all ran.
Then it cut back to the present day, and the ancient script was read. The demon appeared and started "corrupting" everything and everyone.
All the time, I was thinking, "Damn, but that's cool!"