My buddy got bored sitting with me calling moose in my lookout spot in September and went to check out our other stake-out. He had a mother griz with three adult cubs spot him from about 60 yards away, then approach to within 17 yards and stand up for a good look at him (we went back and measured it later with the rangefinder). He stood up, held his rifle in the air to look big and backed away slowly. He said he felt amazingly calm throughout the whole thing, thinking "If this it it, well then, this is it."