Totally random and off topic, but since it took me 40 years to learn the only 100% effective way to get rid of hiccups, this is it.
You need to create an extended period of negative pressure in your oesophagus, to de-activate the vagus nerve, or whatever it's called. The reliable way to do this is to have a bottle of water and a straw. Plug your ears if possible - helps but it's not strictly necessary. Crimp the straw somewhat with your teeth. Now spend 20 or 30 seconds slowly, but with a high pressure, sucking water through that straw and swallowing it. Remember, your goal is negative pressure in the oesophagus for an extended period.
It is the only reliable method and for some reason is almost completely unknown. Well, now you know!
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