I have dreams exactly about zombies, ghost and demons as well...they frighten me when I wake up. I had them almost every night for a few weeks not too long ago. And I wake up many times during the night. I wasn't sure what they meant. My dad has always told me I know too much too. When I read that I thought to my self how familiar that sounded. About politics, psychology, everything:/. I usually unfortunately cannot control my bad dreams, but I can control my good dreams sometimes. I'm still trying to figure out why that is. Are the bad dreams more powerful? I can talk for hours about the universe and how we got here, and why things are like they are, and why people are like they are. There's multiple answers, and some cannot be answered. I have many theories though. Please share your dreams with me, I can definitely relate to some of your unusual ones:]