Finger Stabbing

I was peeling an apple for Baba this evening, she can't deal with the skin on apples due to her lack of teeth. the knife that was used was so old and had been sharpened so many times that it was more like a sword. Not being familiar with this knife an accident was waiting to happen and it did. As I stabbed my finger misjudging the length of the knife when cutting the apple into segments.