Bush pigs never go after a human as a meal. This guy is full of it. She ran, so the bear took off after her. If you run, they chase. If he was really hungry, or mad, the forearm to the nose would have resulted in a quicker start to the meal.
Check out what a professional hunting guide says about black bears:
Never Trust a Black Bear
"Hunters are arguably the best educated about the dangers associated with bear encounters, but invariably talk turns to grizzlies or Alaskan brown bears when the word "danger" comes up. Seldom will hunters talk about black bears being anything more than a "simple" nuisance. Nothing could be further from the truth. . . Another fallacy about black bears is that they'll leave you alone if you play dead. In truth, black bears normally kill for food; when you play dead you only make the job of killing easier. . ."
Here's the link: www.outdoorlife.com/outdoor/hunting/article/0,13285,193764,00.html