1. I used to keep my lights on all night, but I stopped being able to sleep. (Something about the chemicals in my brain reacting to the light and thinking it was daytime). It was because my mom's house freaks me out. Ever since we moved there when I was ten.
2. Heights. Not falling.
3. Zombies. It's completely irrational, but I look for escape routes and weapons, just in case. There's an axe in a closet about a yard from this computer, and four exits.
I have a friend who is afraid of octopuses (octopi?), and another friend who couldn't leave her house one night when, two years ago, there was a sudden heat wave in February and all the moths hatched early, all at the same time.