Odd Fears?

So I know most people have some irrational fears. For example, I hate looking at glaciers (or pictures of glaciers really, since I've never seen one in real life). I hate how you can see them so big under the dark, deep water. For some reason it freaks me out. I guess since I hate deep water. Also, when I'm driving I hate being behind trucks that have a ladder rack, because I'm afraid that their equipment will fall off and hit my car. Yeah, irrational since I'm sure the stuff is secure, but still makes me nervous. What irrational fears do you have?