This is a good act of revenge, but they also could have deprived this human of precious oil.
No Hiding: This seems counterintuitive to staying alive, but hiding will also wake the killer instinct in a bear. Especially stay out of tents or trees. That's practically daring them to come after you.
Bear Hug: A man once escaped a bear attack when he locked his arms and legs around the bear in a reverse bear hug, which made it confused and it ran off. If you're on your back and the bear is on you, it might be your last resort.
Gag Reflex: Bears, like many animals, have poor gag reflexes. A man recently survived a vicious bear attack by shoving his arm down the bear's throat, causing it to gag and then retreat.
He was also a talking pig, but he wasn't a good writer so the next best job he could get was working at a slaughterhouse.