I have a phobia of balloons (Globophobia), I just hate it when they pop because of the loud startling sound they make and their bulbous disgusting look, like a boil from some sort of strange plague and just about everything makes it look like they're just about to pop.
And while I'm not sure if this would count as a phobia but I am and have been since I was quite young quite afraid of Dogs, it made more sense for when I was younger since they're a common thing for people to have in their house and when I was a five year old 5 year old a full grown dog could've be about my size and if a full grown dog ever wanted to kill a 5 year old child, he probably could, and then there's their loud angry barking and the fact that they all have ancestors which were carnivorous pack hunters. And I have once been tackled by a dog, almost knocked down stairs by another dog and have heard a story from someone I know in which they were biking and during so were chased by an angry Dog.