Omri reported on his experience:
Great to see this post!
I was looking for other people who are able to stop breathing just by will and glad this is on.
It seems that we use similar methods, they serve the same purpose, but on a different perspective.
Instead on focusing on the muscles, I focus on the hiccup thought and not let it through.
Well, I guess it sounds strange.
The same purpose is by keeping the focus and intention on stopping it yourself, controlling your own body. So, glad to hear you and the other people here managed too!