You guys may (or may not) be surprised to learn that the guy in the photo was stabbed with a broken beer bottle. You might have thought the assailant couldn't grip the broken bottle that nicely, but evidently he made effective use of it. Just goes to show, it doesn't have to be a proper utensil/knife at all and it can still do a lot of damage. He was lucky that he didn't get that in the neck, because then he would be in a lot more trouble. My point is, if the assailant has a knife/piece of glass/screwdriver and you don't have your weapon drawn, you are not in an ideal situation. Better to run and get the required distance to enable you to draw.