Let's see... stabbed in the leg with a filthy pitchfork
When Shannon stabbed Joseph in the right leg with a filthy, horse-dung shoveling pitchfork, right about where his femoral artery was, that's the point at which I started losing interest. When Joseph was on an ocean liner a few days later with no gangrene or even a fever, that was when my suspension of disbelieve took a hike. I shut the movie off and started reading a good book instead.
If something like that happened in this day and age, assuming that the victim didn't bleed out in a few seconds, he would at least find himself in an emergency room and intensive care on massive amounts of antibiotics, praying that he would keep his leg.