I had kind of a standoff with a brown bear on Admiralty Island in Southeast Alaska back in the 90’s. A large adult strolled up to within 50 feet of me while blowing a deer call - I hollered and he stood up, looked in my direction and sniffed the air. He then popped his jaw twice, got down on all fours and wandered off. I had a bead on him the whole time with my .338 - after a bit I went back to my boat and changed my underwear.
Must have been smarter than the average bear if it learned how to blow a deer call.