its standard, there’s no fighting allowed in IIHF competition, be that as it may, you and me both know as players there’s a code to be upheld, and this sorta thing doesn’t surprise us.
I duuno, guys just get right down to business, two designated enforcers drop the gloves, circle & maneuver, then fire repeated shots to the head. Usually they get tired & the linesmen separate them before there’s any real harm done. No hair pulling IIRC.