I shot one a while back and once he was out of sight I heard a loud snap. He had a decent blood trail but could see him from the spot I shot him at. Initially I figured the snap was a tree limb breaking but when I found him it was obvious he broken his neck running away. He hit a twin 4" dogwood and dropped right there. The shot had cut his carotid and it appeared he lost enough blood pressure fast enough that about 3 or 4 seconds after the hit he was running at full speed and lost vision. Anybody else have any super quick kills like this.