Pigs are getting smarter. Second one tried to run in a 'serpentine fashion'. wink
But not too much smarter, still running toward the shooter and remaining out in the open instead of seeking cover.
Reverse psychology. Hunter expects a certain response, Hog does something completely unexpected in an attempt to rattle the shooter.
Smart, but didn't work this time.
The lack of a suppressor must of confused the hog.
No doubt. Hog probably ran toward the shooter to see what the heck was going on? Or not?