too much snow in Canada: no more shovels!

I know a few people who tried to buy a shovel recently only to find that all stores seem to be sold out. I had the same experience when trying to buy a snow roof rake. So I went browsing on the good old Internet and found the Sno-Knife. I've ordered it and I will try it on my roof where snow has accumulated to 4 feet high in one area! I'll let you know if it works well or not.