I think you should know

[Ibetyoudidntknow]

I think you might need to know this:

How to cure hiccups

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This talented gentleman needs more recognition for his work in science

I've always found breathing in as far as you can, then breathing in a bit more. Then hold your breath for 10 seconds. And that's it! No need for a can of pop or a glass

I once tried drinking warm water upside down with a knife, but it didn’t work

Also hold nose keep mouth shut and swallow 3x ( very hard to do ) cures hiccups and popped ears

Umm was the water upside-down or you and where was the knife?

I just hold my breath for 90 seconds

A glass of water does the same.