Personally I know of someone that swear they made such a shot. Now I was not there to witness it. He did have a deer. And he is by all standards an excellent shot. Whether his wife was wearing a thong I can not say.
But to answer your question there really is not enough information. What kind of rifle? Is this person a BS'er? Is he a good shot? Or is he usually pretty lucky? But to make it interesting.. I will GUESS... fact.
What is the most wild shot you ever made on a game animal with any kind of weapon?