I personally did 5 years of Lau Gar kung fu which (in the west) seems to be mostly found in the UK. I've been out of it for years, but I do remember one classic lesson.
My instructor asked me what I'd do if I ever came across someone who did Judo or some other form of wrestling and then proceeded to demonstrate. Ouch.
When he offered to show me how to defend against this kind of thing on the street I rushed him trying to grapple him, he pulled out a rubber training knife and stabbed me in the head. Works with a broken bottle, piece of plastic, key whatever.
Either way a lot of ground work was taught at those classes. Being weak in any one area was not considered a good thing.
One last thing, just did a Google and found this. The commentary is whatever, but the video is priceless:
http://www.tkdtutor.com/02Taekwondo/BestArt.htm