I suspect that he made a guess and aimed a bit high but didn't aim quite high enough and that's why his first hit was about 2 feet low. (Thigh instead of torso).
Of course, you have to be pretty good to get that lucky. Even if he was guessing a little on elevation, he still held very well on his horizontal aim to be able to hit a 2 foot wide target at 165 yards (I'll keep using that figure since it's all we have).
That's roughly comparable to hitting a 3.8" wide target at 25 yards. Impressive for someone having no previous experience with armed "hostilities", shooting under field conditions and fighting adrenalin.