I've been scared of bees & wasps, bees moreso as I am allergic to them. I found that out the hard way lol.
But horses, honestly brother - I am fekin terrified. The only thing in life that really, really terrifies me. I can't explain enough how much they genuinely scare me. Not a typical irrational fear, but a deep rooted fear. I can't go near one for pure concern over the animals instinct in knowing I am scared.
Oddly, I have a few pics of being a child and horse riding.. but for most of my teen/adult life; they scare me. No incident, no football hooliganism, no rioting.. nothing naughty.. just petrified.