Dreams of the Zombie Apocalypse

Jeez, where did that dream come from? I was dreaming that there were a group of people living inside a small fortress/ town after society had collapsed. A disease had spread turning people into dangerous half-humans - not exactly zombies, but not exactly nice, either. There were all sorts of Walking Dead-ish dramas among the population, none of which I remember. I just recall the climax of the dream - the "Season One cliffhanger ending," if you will - in which the town founder and patriarch, who may or may not have been a signifier for me, had to fight it out with one of the infected, and lost; whereupon - now infected himself, and calculating how to bring the town down - he climbed up onto the roof, made a raving infected speech, and dove headlong into the town's water supply, collected in an enormous basin. Screwed them good! Then I woke up.