I had a fear of darkness and zombies after seeing my parents play Res Evil when i was around 5.
Then it turned to a wild imagination and the resulting overcarefulness. Basicly if i hear something, i take the closest weapon substitute, and get ready to beat the heck out of it.
I fear large crowds and being in cramped places...I also have a fear of heights that no one knows about, I work in lighting and so I'm pretty much up high all the time...I ignore my fear, but I am scared