And, for a heart-stopping moment, the bear begins a short charge, stamping it's paws and drawing itself up for an attack. The men shout "hey" and "whoa", making plenty of noise, and the grizzly, which must not have been all that hungry or irritated, decides to just move on.
It seems to us that the bear seems awfully used to people and that maybe the bear has been in proximity to tourists for a while. Still, he's not too comfortable around them, luckily.
That would have been a great time for a little toot of bear spray right into the animal's snout. Thankfully, it could have gone a whole lot worse if the bear weren't in such a serene mood.