On every gun site I've visited, people concur that a Grizzly wouldn't even hear a warning shot and that a warning shot would just tick off a Grizzly. I need to start taking online forums with a grain of salt. This Grizzly was clearly ticked. Further, the Grizzly appeared to be protecting a cub and territory. That's the perfect storm. Perhaps if the man had shot the bear, then the Grizzly would have gotten even more ticked. How many people can say they've been charged by a Grizzly? To date, here's the only person I've seen with proof.