Not an actual fear of something that would happen, but there was a nightmare I had when I was a young Christian boy (around 5-7 years old) that terrified me.

I dreamt that I got separated from my mother while we went shopping, got lured into hell by a demon, and placed into a contraption that turned me into Satan's second-in-command. I remember growing horns and doing an evil laugh the moment before I woke up.

I was borderline traumatized. I talked to my preacher father about it, but said I saw it happen to someone else, as I didn't want him to imagine that happening to his son. But now, as a middle-aged queer atheist, I embrace my role as Satan's loyal devotee, even if I don't understand what I did to move up the ranks so quickly.

My PERMANENT RECORD!

Ghosts. I had a bunch of unwritten rules for where and when they would most likely appear (at night, indoors, dark room, nobody nearby, nobody else in the building) and would do everything possible to make sure I didn't meet those conditions.

The Bermuda Triangle was presented as this impassible nightmare so when I found out that ships pass through there hundreds of times a day it was really disappointing

I was absolutely terrified of aliens. I would sometimes refuse to go outside because I was scared of being abducted.

As an adult I realize, if they exist, they certainly don't want to talk to us*

*yet

Being eaten by the toilet monster that made loud angry noises after flushing. Didn't result in anything, but I do remember hurrying out of there for a few years

ninjas hiding in my closet and poisoning my dixie cups i used when i brushed my teeth

My mom replaced the hanging toy plane in my bedroom with a realistic white dove. The air conditioning would make it slowly spin around at night and I hid under the covers any time it "looked" at me.

Getting rid of the welcome mat so that vampires don't assume that they are invited

I used to be petrified of this singing Santa thing my family had. I found a video to illustrate my point:

https://youtu.be/U3a9k5s1Iyw?feature=shared

I think something about his voice and the way his mouth moved freaked me out. We still have him too, he's actually in a box a few rooms away right now...

When I was like 4 I had an incredibly vivid and terrifying dream that on paper sounds absolutely ridiculous but scared the shit out of me as a kid. I dreamt that a band of orangutans had gotten into our house and were hiding all over the place: in the walls, under the kitchen table, behind the fridge, behind picture frames etc. and every now and then they'd jump out of their hiding spot and attack us. It didn't result in like a long-lasting fear or anything, in fact orangutans are my favorite animal, but to this day when I think back on that dream I feel a little hint of fear.

I was terrified of clouds as a kid

Because clouds could mean thunderstorms

And I was afraid of thunderstorms

Then I got prescribed antidepressants and that helped a lot

I used to be scared of the devil. Now I listen to satanic music and tell God to fuck off. I wasn't exactly a kid but the first time I listened to satanic metal a part of me was like "am I sinning?"