I was moving slowly and lost my balance next to a tree and in a instant found myself upside down in a tree well in about 3 ft of snow. I was on my back/left side with my left arm pinned under me. Luckily my right arm was free, because my face and mouth were filled with snow. I was able to clear out a breathing space and then gradually clear the snow away from my head. It was very scary because every time I moved the snow away I was covered again. I finally cleared the snow above my head and was able to see some sky through the tree. I could not move my head but did free my left arm and managed to kick my skis off.
Ok, now relax and control your breathing. Got the cell phone out of my breast pocket and flipped it open. Of course, no signal. Tried it anyway but nothing. Holler for help every once in a while and kept digging. Still can't move my head but I did kick out a hole and was able to get my feet down some. Then grabbed the tree and see if I can pull my self up. My head moved some. I couple more pulls and I am sitting up in the well. I was then able to crawl out the side from under the tree.
Gathered up all my stuff, nothing seemed to hurt. Goggles are full of snow. Gloves and jacket are soaking wet. Put myself back together and ski down to the lift and then back to the lodge at the top of the mountain. When I went to get something to drink the young lady said "What happened to your nose" I am guessing it was abrasions from the snow and ripping my goggles off.
You would think in 55 years you might figure out that when they say things like "don't ski alone off the groomed runs" it might sink in. It does now.