Good demonstration at about 3 minutes into the video Shaolin Kung fu child & Iron shirt Demo Jin Zhong Zhao.
This is genuine, it is unique in that:
1) he does not move,
2) he does not deflect,
3) he does not have a thin layer of kevlar under his shirt,(no shirt),
4) blows taken are powerful, and
5) HE TAKES MULTIPLE BLOWS FROM MULTIPLE ANGLES
SIMULTANEOUSLY!
http://www.youtube.com/watch?v=3Gfq5UEus6k
Multiple demonstrations, but not as high of a level as above, good though.
http://www.youtube.com/watch?v=8u7bx...E7A63&index=43