I get a permission error to see the photo....
But isn't BK's claim to fame charbroiled bugers? I have heard them do this (microwave), but usually when it is slow, or near closing times. I guess it's standard procedure, or some employees are lazy and have already cleaned up the grills so they can get out on time and go party?
To know if they are cooking them wth flames, just look at the exhaust fans, if they aren't blowing smoke, they are not flame broiling the meat!