Heights
Bugs, parasites, & spiders
Death
Injury
Pain
Fires
Losing loved ones
Speaking in front of people
Car/plane accidents
Water

Once when I was a kid, we used to go in this lake at camp. One day I brought goggles (the kind that hold my nose because it hurts my nose when I jump in) and I wa dared to look at the bottom. But I couldn't, it freaked me out too much what might be down there!

I HATE heights. Never will. I wnet rock-climbing once, looked down to tell the guy I wanted off, and geez it was soo far down, so of course I just let go (which caught the guy by suprise) and got off of there!
I used to like flying, but then I watched 'Nightmare at 20,000 feet', which is an episode of the old Twighlight Zone, and have never flown in stormy weather since. As for planes in general, I hate the take-off and the landing too, when we take off, I'll usually cling to the seat and start getting all paranoid. Same with landing. But after that, as long as I sleep straight through it, and don't look out the window, I'll live.