Heights, spiders, wasps (in that order). Only certain kinds of heights, though, because I'm perfectly fine in airplanes or on bridges.

I don't have funny stories about my own fears, but Jojo is also afraid of spiders and in the past when she has found one and no one else is around, she breaks out every chemical cleaner in her apartment and sprays it to death, because she's too wimpy to get anywhere near them. It once took about an hour of on-and-off spraying, and I was talking to her right afterward and noticed she was actually a little high off of all the chemicals. It was amusing in a pathetic sort of way.