Blood only takes 60 seconds to travel through your entire body, but speed isn’t shat causes the squirting, it’s the pressure. Your brain needs a lot of oxygen and nutrients, so as a result it gets a lot of blood. Your head is also above your heart, so your heart has to do a lot of work to get the blood up there, which means a lot of force (pressure) pushing the blood up into the neck. When there’s a hole for the blood to escape, instead of the blood going up to the brain, it goes out the hole.
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