Lots of people are afraid of normal things like the dark, or speaking in public places or heights, but not me. My greatest fear is the fear of demons. I grew up with a very religious mother who took me to a somewhat old fashioned church that liked to preach about Hell and demons more than any other topic.
While staying at my mother's friends' house one weekend, I walked in on her children watching the Exorcist. Knowing I could never get away with seeing this movie at home, I took advantage of the situation and sat down and started watching it with them, but it only made me even more terrified of Hell and demons. I got scared that if I wasn't good enough I might get posessed by demons.
Thats not a big deal for me anymore. I do believe in Hell and demons, but getting possesed isn't a big fear of mine, though the concept of demons still freaks me out.