I was teaching a 'safety with cutting tools' class and cut off the whole side of my index finger (ironic!). Pretty bad cut, to the bone and requiring 6 months in a cage with therapy (at least it happened at work). While it happened because I was not paying attention and was thinking about the next thing, it still scared me to the point that I purchased one of the suction grippers. Funny thing is that I required my students use it, but I don't use it. I think about it, but then don't use it. I do, however, focus on what I am doing and move my hand further from the edge!!!!!