Art-of-moi, very interesting. I would say that I can’t wait to try it, but I’d rather test it later than sooner.
I have heard of the holding the breath method. It seems to only work if done right away, before the pattern sets in. Even then it is not so reliable.
Oomis’s method is interesting and sounds almost similar to my method that I heard from a cousin: to bend over and drink from the opposite side of the cup. It works every time.
Recently, I came across an accupressure method. Press the area in the skull behind the ear lobe while breathing slowly. I tried this on my child with instant successful results. I didn’t get to try it out many times.
As for loud or painful hiccups, that is caused by the fast pulling of the diaphram, which in turn pulls in a lot of air suddenly. To avoid this try to keep your lungs full.
Now, what if I’m the only Leivi in the Minyan but I have hiccups, can I just not say anything and allow the Cohen to make two extra Brachos?