The horse usually holds his head up high while exhaling through the nose with it's mouth shut. The strong exhale creates a vibration or flutter sound in the nostrils. The snort lasts only about 1 second. It is very loud and can be heard up to 30 feet away.
"THERE MAY BE DANGER" or "IS THIS DANGEROUS?"~ The horse snorts, followed by an intense stare at the object that it is unsure about.
"IT'S NOT DANGEROUS"~ The horse relaxes and/or ignores the thing that it questioned.
"IT'S DANGEROUS, I BETTER LEAVE!"~ The horse tenses up and shies away from the danger.