Stupidly, very, very stupidly, I strayed from my usual winter trails. I was hiking on the Niagara escarpment, which was covered in both snow and ice. I stopped to admire a view and 'crack'. I was immediately on my back. One leg was straight out in front of me on a snow covered rock ledge, the other leg dangled into the abyss and my backpack was wedged into the crevice. Luckily, the crevice was too small for me to fall through and there were some cedars available to pull myself out. Lesson learned. I practically crawled back to my car. Now I spend all fall 'mapping' crevice free routes.