Just watched this flick the other night, Wow!! "Whoa" happened more times than in any Matrix trilogy.
Main character Tony Jaa is like a Bruce Lee, Jackie Chan, and Jet Li all rolled into one. He may not have the martial arts training like any of the three but his physical attributes put him up there with them. No wire harness acts are used in this movie.
The story line can be found here if anyone's interested:
http://www.lovehkfilm.com/panasia/ong_bak.htm
Here is a (Quicktime) trailer:
http://www.apple.com/trailers/independent/ong_bak.html/
The story line isn't the greatest nor is the acting but the fight scenes make than making up for them.