Take the moment to think about hiccups.
Its pretty strange that our diaphragm twitches as often as it does for long periods of time, while other twitches that we have only last a few seconds.
what makes it different than other muscles?
I am betting that it probably has to do with the fact that breathing is both involuntary and voluntary. I don't know why I think that, but I wouldn't be suprised if those two factors have something to do with it.
Why do we get hiccups more often than any other twitch?