I don't know...I'm pretty terrified of miniatures myself.
Reminds me of when we first brought our foster mare, Bree in to live with us. Apparently she has a pathological fear of miniature horses, pigs, and ducks. And what kind of farm did she come to?
A miniature horse farm with over 20 head of minis, two potbellied pigs, and a quartet of afro-ducks xD she was besides herself. Pacing, shaking, dripping sweat... Never did get over her fear of the ducks, but after two months of (yes, we're cruel) being pastured between two pens full of them, she decided that she just hates them and realized that a good caca face can scare even the evilest of them away.
Horses are so silly! There is a lot of hunting near where I board, so gunshots nearby are nothing. Then one day, as we're cantering through a field with kinda-long grass, a giant horse eating poop pile of doom shows up! Some interesting acrobatics happened because of that poop pile...
My TB never even flinched at a gunshot when our neighbors fired off...like they're doing now (not right now, but recently). Even though he's off the track, I wouldn't expect him to be perfectly okay with guns...
I can truthfully say that ST is bombproof. She was the -only- horse at fair that didnt flip their lid at fair when they set fireworks off (dumb on their part, but oh well), she lives next to a shooting range, I can shoot my bow while holding her and she wont move a bit, and I have a feeling a bomb could go off and she wouldn't care less. I trust her training enough to put a 2yr old on her alone (though I wouldn't). She's definitely the most spook-free horse I've ever had the pleasure of knowing.
While she absolutely despises the new mini, she's not scared of her the least bit. She's fine with all traffic (motorcycle, horns, semi's, etc..even when they blow by close enough to touch. Posted via Mobile Device
My horse allows me to rub the plastic bag all over her, including her face, and lets me fling it around to make noise and tab her with, attached to the stick and string and not attached, and tie it to her halter and let her walk around without it freaking her out.
One time I was out in the yard with her and a military jet flew by really low, and she only had a minor freakout that was controlled within a few seconds.