Not for the faint-of-heart (it's real): imagine you've picked a fight and suddenly your competitor goes into a kung-fu stance:
http://www.comegetyousome.com/video/kung_fu.wmv

Found at http://www.comegetyousome.com

honestly, you cant really tell what level the guy's kung fu is. If he were a truly high belt, he likely would not have gone into a stance at all. the element of surprise is missing... but you never know.. kung-fu.telepotence.com

Looks kinda cheesy and you can be prosecuted for grevious bodily harm if you fight somone using martial art techniques (open hand,horse stance etc).