Im going to say theres some truth to this. My friend was hunting on our property 2 years ago and shot a decent6 pointer. He didnt intentially shoot it in the neck, the buck tried to duck and turn and the arrow ended up making contact with the neck, severing the main artery. this buck went maybe 50 yards and dropped dead. he said it didnt run but maybe5 seconds and couldnt run any more and walked the rest of the way before it dropped right next to my car in the field. Would I recomend this shot, no, not to anyone. Does it happen, yes it does. Is it effective, yes.