I missed one last year while deer hunting. I had one jog through a powerline I was watching, but missed. I sat there thinking for a few minutes, questioning myself why I didn't whistle to get him to stop. Well, a few minutes later, I had two more come through in the same exact manner. I whistled, and they both stopped dead in their tracks. I nailed the first one, and to my knowledge, the other one is still running!