Most viewers will wince when they see a wound inflicted on a sympathetic character, since physical injury is something all people can relate to. For similar reasons, a motif that involves a part of the body is a particularly visceral one. Of course, if the body part in question has been separated from the rest of the person it belongs to, it's a given that there's a Poetic Serial Killer around. Giving some thought to which part of the body he uses as a "trophy" is usually a clue to his motives. Examples of Body Motifs include: