Well, one little mistake is all it takes sometimes. I was finishing up some work on a remodeling project. As the counter tops were coming together, There was a little piece of trim that needed to be cut back an inch. Out comes the utility knife and I stark cutting it back. I was just about through and gave it one last hard slice. At that same moment my left hand moved into just the right position so that when the piece came loose, my left pinky finger caught the blade on the down swing! Oops!