Probably they all stood back a safe distance and waved their arms and made a bunch of noise. The problem is not a luck of guns but a lack of balls. Take that fire extinguisher over there and whack that bear as hard as you can. If you can hit it on the nose, so much the better. The bear was not frightened by noise because it was used to that. It’s just big dog and a group of people with heavy objects could have beaten it down in no time. They were more worried for their own safety.
Jump in your pick up truck and run the damned thing over.