Earlier quoted context omitted.
Reminds me of that guy who started drinking water upside down to train his swallow muscles and cure his chronic heartburn.
In Japan, I learned to drink water upside down to stop hiccups. Works for me, whereas drinking normally doesn't.
I suck in a lungful of air, hold it in as long as I can, then when I can't hold it any more, suck in even more air. Basically take in as much air and hold as long as you can, and the extra gulps of air I think open up and "reset" your throat.
Sometimes it takes a couple of goes but it has always worked for me to get rid of hiccups.