^ BAHA I literally just burst out laughing.
I used to have a pony that was utterly bombproof, I swear you could tie a firecracker to his tail and set it off and he wouldn't flinch. But apparently he wasn't bumproof. He would spook at farts. Didn't matter who did them. He would even freak out over his own farts.
My gelding is convinced beach balls are terrifying, and hates sheep, even though my next door neighbour has a whole flock. And there's this one place on the trails that he hates, but there's nothing there. He just hates the place. [and it doesn't smell of death, or anything... he'll walk straight past a rotting roo carcass without batting an eye or even screwing up his nose at the stench]
And my filly... sensitive little flower that one... is terrified of EVERYTHING that rustles or gets in under her feet. But for some reason isn't bothered by motorcycles? I was trail riding her and saw a motorbike coming up the road ahead, so, expecting a huge reaction because of how big she reacts to the little things, I immediately put her into a one rein stop, just in case. She didn't even flinch. I mean ok she stared at it [she turned around before she stopped] but she didn't even tense up her back.
But the one thing she REALLY hates? People with backpacks on, people on rollerskates, people with padding in different places. I once tried to take off her rug one morning as I was heading out to go rollerblading, and couldn't get near her. Not until I'd taken off the skates, the backpack, and ALL the pads. She's funny XD