Well, not so much a fistfight as it was a case of the Usual Suspects® ganging up on some helpless victim.
Here's the video:
He was only prepared to go so far with the sword, though; when one of the thugs ran up on him and attempted to snatch it, he administered the back of his hand to the man rather than slash at him or stab him. If he's not prepared to cut someone, he needs to switch to a stout cane of some sort that he can use as an improvised club. Better yet, acquire a CCW license and a handgun, if he's not already forbidden them by a disqualifying act in his history.