My fear of spiders, bugs and other crawly things
Spiders. Why did it have to be spiders?
I've had it as long as I can remember. It's varied from minor heebie-jeebies to complete freak-out and the level of response mostly depends on how surprised I am by the creepy-crawly. If I am not startled by the spider (or whatever) then I can generally hold the panic at bay long enough to deal with it.

