If you haven't seen Tony Jaa in action, here is a clip of his break-out movie "Ong Bak" which features traditional Muay Thai (not the ring version). Warning - even with high-speed internet, this is a long download.
This scene shows him fighting two opponents (sequentially) after returning to the bar where he first briefly displayed his talents. It's too bad the third fight is cut off in the middle because things get REALLY crazy, but maybe that'll be incentive to rent the film. This is the English language dub, which has a different soundtrack. I think I liked it in Thai better because I got to make up my own dialog!