system
Given the following post, respond as if you're commenting on Reddit:
human
Hiccups! why?!

I keep reading that no one really knows why or how they happen. Can someone explain why they happen?
gpt
It's like a cramp. Ever get those when you run too much or bend your leg the wrong way? Well, when you breathe in, there's a muscle that does that, called the "diaphragm." And instead of getting cramped, like most muscles do when they're unhappy, the diaphragm kinda twitches, making you breathe in really hard all of a sudden. That's what we call a hiccup.