This one is a request for Richard. He asked me to make a video so he could see my face when I did a breath hold. As you can see during gasping for air, I twitch my eyebrows a bit... Hope this helps. I think you can see I hold my face pretty relaxed while holding my breath. If you also have a request, just let me know and I'll see what I can do. You can find me on the IPA forum (Dominic M).

Greets,

Dominic