Corrected entry: When Tony Jaa is walking through the airport, he bumps into a man who just happens to be Jackie Chan.
Corrected entry: When Tony Jaa defeats the Capoiera guy in the burning temple, he disappears and is never seen again. The same is true for when he defeats the guy with the swords.
Correction: I've watched this scene a couple of times. The guy Tony Jaa bumps into is not Jackie Chan, its his (Jackie Chan's) look-alike or more specifically his stunt double. Its confirmed by Wikipedia. http://en.wikipedia.org/wiki/Tom-Yum-Goong.