Good advice but I don't think it would have helped this guy. Sounds like the bear was too quickly on him.
Not that he seems to mind all that much, anyway. Good man. Real good man.
Better advice: Never go out in the back country without making noise. A 'jingle bell' at the top of a walking staff works fine for scooting bears from your approach...
That's why a handgun is best here, if you don't want to carry at ready your 338win mag, or whatever. Heavy bullets, FMJ 45s, or 158 gr 357s are fine. Some folks pick big guns. Empty the gun into his cerubellum(brain stem) and he drops instantly. It's best to have a look at a bear's head anatomy first though, there's no time for trial and error later.