Stacey,
Not all real masters look like the masters in the movies (some do though). If you judge someone by their looks or stature you may miss a chance to train with someone of high skill and knowledge(you probably already know that, right?).

It is better to judge a teacher by his students(his students are impressive).
One of his students is a bouncer and was showing me the techniques he had used in the bar to deal with the tough guys.

On Mantis108 forum he is doing the takedown on me from TJPM ground fighting.

I am mei guo ren, Mrs M is Taiwan ren. I came to Tainan to study PM with Shr Zheng Zhong in 1989.

Before that I studied Wah Lum and several sport MA for 7 years.