Don't screw with bears. They're big, strong, fast, and able to maul you to death within a matter of seconds. If at all possible, you probably just want to avoid face-to-face contact. I'd say this is pretty solid life advice.
But whatever you do, DO NOT mess around with Nishanto.
I wouldn't try this next time you have a few hundred pound bear in your backyard. But you can't argue against its efficacy.
It is Monday, so if you get into a confrontation at work, I've heard this technique also works on bosses.[via reddit]