I am living in asia. I was surpised by the responds some gave me because in my country, challenging instructor is quite common. The answers which many of you people give me is not the culture of martial arts in my country. We have frequent competiton between karate and taekwondo judo etc and challenging instructor is common.
I guess we live in different cultures.
Interesting.
If it is not uncommon, then I guess the challenger getting his behind kicked is not uncommon either...