In the movies, for example, one may see a person being shot in the stomach (or impaled on a sword or some such sharp and pointy object of death), and a trickle of blood forms at the corner of their mouth. It happens to be fairly common up on the silver screen. But my question is, how often does it really happen? How much force is needed to cause someone to bleed from the mouth, or throw/spit up blood? And are there ways of injuring someone to that degree, or killing them, that would not involve them coughing up blood?
I'm hoping this makes at least an inkling of sense. Thanks!