Why would you continue into a fight if the guy takes you to a Dojo that he has obviously trained in, unless you yourself have an advanced discipline...but if you did, you wouldn't pick a fight like that. He is lucky this guy used his fists/feet. You never know what people on the street may have, be it advanced fighting skills like this guy, a knife, a gun. I guess the best advice is, don't be a jerk when you're walking down the street, you might think you're tough, but there is always someone tougher...except for Chuck Norris.