My brother has been stalked by them on more than one occasion while up in the mountains of WY. He has seen them following him in the distance while elk hunting and while fishing on the mountain lakes for trout. He said it makes him a little sick to his stomach if he doesn't have a sidearm. Consequently, last fall, after glassing one through the trees coming up the same trail he walked up while stalking elk with his bow, he went out and bought a .40cal Glock to carry with him and he does so religiously now.