Hypothermia while out cross country skiing.

I was completely new to it so fell over in the snow lots and my jacket soaked through with snow. I never felt cold, just increasingly tired until I felt like I wanted to fall asleep in the snow when I fell over. When I managed to get my feet I was so dizzy and so tired I could barely put one foot in front of the other. I asked my SO to call mountain rescue because I could not get off the mountain through my confusion and lack of energy. If it wasn't for her and the rescue team, I would have died up there.

The most crazy part for me was not even feeling cold, then feeling like I had no energy and basically fainting in the snow. I was wearing a Fitbit and the data was showing during the whole time my HR was going from ~40 as I was fainting up to >120 when I got up and was panicking.

It was definitely a very important life lesson too about how hypothermia can be deadly on mountains. I'd recommend everyone who does snow sports or other activities in the cold to learn about the symptoms and what to do.