Bridges in the rain/dark/snow. I'm unreasonably afraid of sliding off into dark, icy water ... not crashing through the railing, but like, sliding under it. This is true whether I'm walking or driving. Even if there is absolutely no way for me, much less a vehicle, to fit through or under the railing. Completely unreasonable images fly into my head, my heart hammers, I want to scream and run away. It would be funny if it weren't so awful.
Also, I have vertigo. Balconies, windows in high offices, scenes in movies with people dangling off mountains or window ledges, etc. create this intense (and weird) physical reaction: My knees ache. My legs just sort of buzz with this phantom pain. Even talking about heights and vertigo can cause it. I can feel it right now, in fact. Dang.
I've often wondered if weird phobias are rooted in previous life/death experiences. If so, I sure seem to have fallen to my death/drowned a lot. *shudders*