Up until recently, I had never cut myself seriously with a knife, but this Christmas I had received a couple of new knives, among them was a Buck 110 Slim Pro with an extremely stiff action, heavy lock spring, and a razor's edge...
I was working the blade trying to break it in while I helped my brother to setup a new electronic device I had got him as a gift, and that brief lapse in concentration resulted in my accidentally allowing the blade to slip free from between my fingers and snap closed on the middle finger on my other hand.
It left a pretty deep cut, deep enough to need stitches, but no way was I going to the ER on Christmas, so we butterflied the wound together, bandaged it up, and enjoyed the rest of the holiday with my family. It's healed up pretty well by now, but it's going to leave behind a deep scar.