People think that just because it does "not feel THAT cold" when they are standing next to the door that they can step out for a few moments. And mostly they are right. Except when you are not.
Almost thirty years ago I was finishing up my shift and went to empty the outside trash. I slipped on a tiny bit of black ice. Tore the devil out of my knee until I could not stand. So I started crawling back toward the door. Kind people driving by saw me, stopped and came to help. I was dressed warmly and still by the time I got back inside I was so cold and in such pain I couldn't remember my own phone number to call for someone to take me to the ER. It was down in the single digits the night I fell.
When you are on the ground the cold sucks all the warmth out of your body and the thinking part of your brain begins to shut down.
yes, it would certainly be necessary to call for help right away assuming that’s possible