I have had people/ thugs, tough guys, fellow martial artstis come into my school and make claims about thier knowlege, skill or toughtness and if they choose to fight to test thier skills I allow my students to engage.
If the guy is a **** talker and gets his arse put on the mat or chocked out I see nothing wrong with it, its isnt ballet class its kung fu.
We have enough people talk about pajamama wearing, non fighting lackies learning forms with no application so this is a great way to shut up the non believers.
the guy could have tapped, he choose not to, he got what he asked for , nothing wrong wih this, the chocker didnt even strike or kick and actually took it esy on the other guy, it was a fair roll.