Yeah, usually hogs just want to run away. But sometimes they attack without provocation. A friend was bowled over by a big sow from behind; his muzzleloader went flying and he grapped the .45 on his leg. The sow came back and was killed. Two other sows were watching the action.
This Slidell, LA man was torn up by a rather small hog.
http://www.nola.com/outdoors/index.s...idell_man.html
http://www.louisianasportsman.com/details.php?id=6862