Now, what I was really afraid when I was a kid was: astronauts (I found it eerie and creepy, not really afraid of), and Judge Doom from "Roger Rabbit", that one really f**ked my brains out. When Judge Doom gets crushed by that roller compressor thing, what I had left of sanity was throw out of the window there (back when I was 6, when I watched it for the first time, in 1988).
Today, I'm kinda afraid of heights when there's nothing below me. I can get into a tall building and look down with no problems, but I could not possibly get into a helicopter or a baloon. I'm afraid of airplanes too, when I get into one, I'm positivly sure it'll crash. And I dislike reptiles. And that's it.