The big window at the bottom of my stairs. It was one of those distorted ones and it had like a 1980's flower pattern on it that you couldn't see out of properly. When you came downstairs and turned on the light in the middle of the night it would look like someone was standing outside. So instead I would race down to the bathroom in complete darkness, trying my hardest not to look out that window and I would always feel someone watching me from outside. It was creepy!
Oh and Germs! For a year of my child I had such a fear of catching a disease that I had like 6 different soaps and hand sanitizers on the sink and I would wash my hands ALL THE TIME. If I was eating a sannich or something I wouldn't eat the corner I had been holding it was fucked up. I grew out of that now, I am a big dirty man these days
Also when I broke my arm I got this irrational fear I would break it again so I kept extra protective of it. Now I have a huge phobia of broken bones, I guess a phobia is the wrong word it's more like an adversion. I get all sweaty and wanna puke if someones talking about one, hell even if I imagine breaking a bone I get all freaky about it :S.