I agree. It's impossible to tell, but it also looks like the first shot hobbled him. I would think a pro, from that distance, wouldn't have any trouble with a center mass or head shot.
“Hi T zone”... draw a line across the collar-bones down to about mid-abdomen... Center mass shots go there... And anchor shot is usually up close and to the head...
This guy practiced enough to be ON with the first shot... but after that... Not so much IMO...