drop bear
Sr. Grandmaster
Show of hands. How many people have actually had this happen?
On the rare chance that it did, I would politely decline. And if he pressed the issue, I would call the police.
I don't know this person. I don't know what rules they'll want to fight under - rules which I may be ill prepared for and would make me look foolish. I don't know if he wants a friendly bout or if he's going to keep going even if he TKO's me. This isn't a sanctioned bout with a referee. It's a random dude walking in off the street with what might as well be pajamas he bought off of Amazon. At the very least, he's interrupting my class. I have nothing to gain by fighting him. He's put me in a situation where the best outcome for me is that everything stays the same.
I would want my students to learn that you avoid fighting at all costs. And just because he wanted to fight me, doesn't mean I have to fight him.
Greg Saunders