Interesting. I had hypothermia a few years ago. I went out on a mile long jetty in the dead of winter during an ice storm wearing a thermal hoodie. You don't actually feel cold after a certain point, just really crappy and kind of numb.

I needed warm IV fluids and lots of blankets then. Wonder exactly what I need now?

Edit: Remembering this, the rescuers did apply heat packs to my neck and groin.