The thing that causes these injuries with these Dutch police techniques is that it messes up the whole lower body blood circulation. And plus the police men are not trained enough to do them properly. "When a customer is still resisting throw a little bit more power to the crunch."
And that thing ...

Why don't you Mike try training with people from other countries. That can REALLY get you confused. The terms is different places are a little bit same but yet different. Jutsu becomes jitsu, matsu becomes mokuso, yoko becomes sokuto etc.

I had some trouble when started training with a British ...

I believe that many Jitsu schools still teach leg locks to even lower grades. I studied Liikan Jitsu and I remember that we had to know five leg locks for our orange belt grading. I also hear that the Dutch Police Force are taught leg locks. The problem is that these leg locks can cause the ...