What is actually moving when you hiccup?
That hic is not in your throat - it is a muscle below your lungs jerking out of rhythm.
A hiccup is an involuntary spasm of the diaphragm, the dome of muscle under your lungs. It jerks down, you suck in air, and a split second later your vocal cords snap shut, making the hic. Oddly, this exact pattern is how tadpoles pump water over their gills, so hiccups may be a leftover from our water-breathing ancestors.
You gulp a cold ca phe sua da too fast, your belly does a little jump, and the hic starts - that jump is your diaphragm, not your stomach.
A hiccup is a diaphragm spasm, an old reflex wired into us from way back in evolution.
Knowing it is a diaphragm reflex explains why slow breathing or holding your breath calms it, while drinking water does little.
Hic = the diaphragm hiccups, the glottis hangs up: down-jerk, then snap shut.
Learn the idea and practice English at the same time.