I'll just throw this out there for discussion. Some people have it and some do not.... but if you can pull off an abrupt, loud, harsh and commanding voice, I think it can be deployed strategically, taking people off guard and putting them on the defensive. I wouldn't want to hang my hat on my ability to spook a BG by yelling at them, and I wouldn't go barking at shady character without something to back it up. But I think it can throw a BG off stride and buy you a second or two to draw your piece or move to a better position. It can also establish your presence as someone who is pissed off and not to be trifled with. What made me think of this today was that I chased off a pretty large black bear that was taking out our bird feeders at first light and when I harshly barked "Hey! Get out of here!" he wanted nothing to do with me. Any thoughts or first hand experiences out there?