Nope, no short bus horse here.
He's very very SMART! Just because things like his dinner or a differently colored bucket scare the begeebers out of him doesn't make him dumb. Nor does his innate ability to trip over every single rock, twig and weed in his path. He'll eventually stop marching every time I put back boots on him..... he just needs more time (a year just hasn't been long enough).
Tail flaps on blankets are REALLY scary and warrant trying to run away from them when the breeze moves them. Being left alone while tied? VERY scary and no, a trainer, a BO, a small child, a saddle fitter, a Vet or a Farrier is NOT an acceptable babysitter, they just make things MORE scary!
Trailers eat horses, water eats horses, rocks, sticks and park benches all eat horses.
The arena fence falling down though? Now that wasn't scary... The neighbor's dog attacking and mauling their pigs? Not scary at all!
He's not at all short bus.... he's just special!