What Are Hiccups For?

Could someone please, please tell me what hiccups are for? I keep getting them and it's really freaking me out, they just come out of nowhere and send this weird convulsion through my body and a strange little noise comes out of me.

To top it all off, daddy seem's to find it hilarious and just laughs; IT'S NOT FUNNY DADDY!

I wish he would get them and then we'd see how funny he thought they were.

Here's me mid hiccup