Most of the pictures do not show an excess of blood, and this is because most are intended to depict the moment of the stabbing or the few seconds immediately afterwards; since a sharp knife makes a very clean wound and the blade may completely fill the resulting hole--and since the skin tends to cling to a knife blade (not rarely causing a vacuum lock that makes the blade very hard to pull straight out), there may be little or even no bleeding until the knife is removed or until the blade is moved about and causes some cutting of the surrounding tissues.

Also, the view most people have of what happens when someone is stabbed is based on the way Hollywood portrays such events, and that way isn't generally accurate at all. Unless the blade enters the heart, death occurs from exsanguination (blood loss) or from effective drowning (due to blood in the lungs) and takes a while; in real life, most stabbing victims are stabbed many times, sometimes dozens or even hundreds of times, and continue to struggle with their assailants.