Not nearly as dramatic as the other stories on this thread, but as a graphic designer, I've had my share of injuries involving x-acto knives. Thing is, when you're trimming a piece of art and you forget/don't notice that a fingertip (or 2 or 3) are hanging over the edge of the ruler, the *first* thing you think is, "Oh ****, did I get any blood on the artwork?" Priorities, doncha know...