What a bunch of hysterical hypochondriacs. Get to a surgeon? Oh fer Chrissakes!
I've had this happened to me periodically before. I think when there is a build up of acid in the stomach and you stir up the digestive process by ingesting anything, even water, this can happen. From what I understand that little flap can be relaxed for a number of reasons, most are not life-threatening. Happens to pregnant women for example because of hormone changes that relax a number of muscles in the body including the flap and cause reflux issues. If someone is overweight, they tend to hvae more issues with reflux.
While there are some reasonable answers over there, the two or three that run around like the sky is falling! No wonder these idiots want 'free' healthcare when they go to such extremes when their body has a case of the hiccups.