[SideburnsOfDoom]

I used to "cure" my hiccups as a kid, by getting as upside-down as possible, generally by hanging off a bed or couch, but always with head at a lower level than stomach. Then drink water. The Esophagus has to be working to push water uphill.

It has same effect: pressure on the diaphragm. It worked ... ish, or it was at least occasionally successful or gave some relief, better than nothing.