I tracked a deer a few years ago that was shot with a bow facing the guy. Muzz bayed him and when I called him off to shoot all I could see good was two red eyes. I guessed about where to aim and shot with my 44 pistol. Turns out the deer was facing the opposite way I thought he was and one eye was really a red lumenoc. Shot him through one eye and out the other without messing up his skull.