I had nearly the same thing happen to me several years ago 'cept instead of watching squirrels, I was reading the pocket New Testament I take with me. I looked up just in time to watch THE BUCK (BIG 10 POINT) we were after walk right through my slam-dunk lane at 10 yards broadside and unaware! By the time I was ready, I had no shot and he paid no attention to my grunts either. Bummer - I know how you feel.