Yes, I in no way meant to incourage fighting with my post. I agree, with the best way to handle it, but I'm just curious if you guys had to deal with this type of situation. It seems we get 2 or 3 a year that come in with "something to prove" and I dont mean just in class. There is a difference between a martial artist who comes in and "friendly" challenges you and a nut case that comes in and threatens you. For Example:
Last week a guy came into the school during the day (we are open all day long) when there weren't any classes going on. The only two employees of the school (besides instructors) are my sifu (owner) and me. My sifu was out running some errands so it was just me there, no students or anything. As soon as the guy opens the door I can just tell something isn't right. First thing I notice is that he is deffinitely on something. Having worked so long as a paramedic in downtown Houston, I've seen enough of it. We have a front counter that opens into our back office, it provides about 2 feet of distance between he and I. Before I could get out of the back office and greet him, he says, "I'm just out of the military, what could this do for me"? Immediately I started what we refer to as "verbal kung fu". You sense the "mood" of the comminication and yield and move where you need to. He kept trying to catch me in a place where I would say he was wrong, or something where he could "prove himself". I just stayed with the generic explinations and invited him to class. He started geting really agressive and leaning over the counter at me. He was talking about how his grappling skills were too much for the military and for any human being.

He was talking about how he could side step me, break my arm, and choke me out and kill me before I could do anything to him, especially with our "bug stuff". I just kept agreeing with him that he knew some "really lethal ****", and just kept bringing it back to our classes. It started getting pretty tireing after a while, he was there almost 20 minutes. I had to keep track of who was outside, if he had buddies hiding with him, what was on the front counter he could grab as a weapon, etc. I just decided I would stay behind the counter to difuse anything physical happeneing. There were a couple of times where I almost had to come outside the counter space, like when he went towards our display of staffs, I thought he was going to grab for one. Long story short, he finally realized I wasn't going to fight and just walked out of the place in the middle of one of his sentances. It was pretty scarry, I mean my adrenaline was pumping by the time he left. It was kind of funny, I had to go in the othe room and bust out some forms to release some of the tension. Come to find out this is the same guy that came up and tried to get physical with my sifu about a year ago. That never turns out well for them, if they lay a hand on him they usually just get a nice chin na and escort out of the building. He actually threw some punches and ended up on his back a few times, he had a few buddies with him at the time, but like most, they all just wanted out of the building once it got physical.
Now, on the flip side, my sigung used to have people come in and just spout a challenege and go after him. But I think that was pretty comonplace in the 60's and 70's. I was just woundering how often this type of thing happens. We tend to draw some real nutcases, you know the, "I'm on my way to the coutrhouse to register my hands as deadly weapons" kind of people. But the agressive ones can be pretty scary.
7sm