Last night, I tried an experiment, I didn’t think about controlling my breath. My fight or flight went off last night so to try to shake it off, I held two handfuls of ice for as long as I could. (I saw somewhere online that if you can hold ice in your hands for 45 seconds, it will reset your vagus nerve and turn off the fight or flight mode.) I made it like 20 seconds and it was so brutal. I think I ended up holding my breath. I think something like box breathing would help in type situations. But nonetheless, it helped me out tremendously.