Not sure I get you.
By continuing breathing, hes not dying?
I actually didn't mean to be flippant I was in a rush.
If you focus your mind on your breathing your body doesn't react to the cold. If your mind wanders you then start to feel it.
Not to bore anyone but... I do 20 minutes of breathing exercises in the morning followed by a spell in an ice freezer three times a week. First time you do it it's horrendous and you want to get out but once you train your mind to focus on your breathing you don't feel the cold weirdly enough and the increased oxygen feels warm running through your veins. We do it with people who have mental health issues to get them off medication and it helps them to quieten the mind as you can't stress about life's pressures when you're so focused on trying not to freeze to death and then they can take it into day to day life. It's based on Wim Hof (Google him). I'm working up to going to his retreat in Poland and climbing the mountain in freezing temperatures in just shorts and boots. No idea why, must be mad.
Anyway, I'm not saying that's what Speedomick does but he'll have trained himself to block out day to day thoughts and get in the zone by focusing on his breathing.