We've all seen him..."the karate/self defense" instructor who can do it all.
Here's a bit a fun that sadly points to a real problem out there, that of the karate guy who believes he knows how to fight.
Many years ago I challenged a karate instructor (in a nice way) when I saw his ad in the local paper proclaiming he could teach people to "walk the streets without fear". The guy was making way too much of his 'black belt yondan' ranking for my liking.
Enjoy the lesson, and remember boys and girls....don't try this at home.