There are always exceptions. You should never give up, never stop trying to survive, and this person exemplifies this. But this bear was not trying to eat him and was not intent on killing him either. When the grizzly is charging, you don't know what their intention is, you can't read their mind. Have your device, whatever it is, handy and employable in a second or two. You can't depend on the ability to dig it out of your pack. This guy you refer to was lucky.