- First Installment Wins: Although it is not considered anymore the hit which was hailed up as at his day, Ong-Bak is still seen as the best of the trilogy, one of the best films of its generation, and pretty much the only work by Tony Jaa which is not considered unsatisfactory or suffering from Sequelitis in any grade.
- Follow the Leader: The film was a refreshing work with a young new name in a film genre increasingly populated by aging stars, and marked a new direction with elements like wireless stunts, nonstop pacing and cringe-inducing hard fight scenes. Even Donnie Yen would admit he used the film as a motivating force behind his own peak years later.
- Franchise Killer: Ong-Bak 2, Tony Jaa's directorial debut and his biggest budget film to date, only escaped from being the last film of the franchise because it had to be split in two in order to be saved. Its amazingly Troubled Production and Creator Breakdown effectively killed both Jaa's professional reputation among filmmakers and the possibility to distribute the films abroad, and made the studio lose literally millions. Due to this, when Ong-Bak 3 came in, it became an even worst Box Office Bomb and marked the beginning of a Dork Age for Jaa.
- Germans Love David Hasselhoff: The films, especially the first, were revolutionary abroad.
- Moment of Awesome: Tien's fight against the brotherhood of bandits/pirates/ninjas that adopted him and taught him every form of combat known to man. It's a bit of a marathon too, and many viewers will be exhausted by the halfway point.
- In the first movie, a horribly battered Humlae shielding Ong-Bak with his body when Komtuan tries to smash it with a hammer - and then keeps shielding the statue while the crime lord keeps beating on him. For a character as selfish as Humlae has been throughout the movie, that is saying something.
- Tony Jaa lights his legs on fire and kicks someone in the face!
- Admit it, you laughed in the third film when Rajasena's severed head began to talk.
- Also in the third film, Ping insistently singing some ritual song while helping unsuccesfully a crippled Tien to rise to his feet can become rather cheesy for the viewer.
- "Seinfeld" Is Unfunny: With its intense action and colourful quirks, Ong-Bak paved a new way in the martial arts cinema and managed to stay high for many years, helped by its sister film Tom Yum Goong and its Up to Eleven action. However, after films like Merantau and Ip Man surfaced on its wake, people realized that martial arts films of the same "Holy Shit!" Quotient could be worked out with actual plots and drama beyond the classic action flick Excuse Plot, and their opinion Ong-Bak became tepid over the years.
- Sequelitis: While Ong-Bak was universally liked film at its time, the sequel was pretty divisive about whether it successfully lived up to the Tough Act to Follow or it was too putlandish and pretentious, and then the third film was unanimously disliked by the fans, who spoke against the unexpected inclusion of supernatural elements and the overtly mystic and sometimes bizarre plot development.
YMMV / Ong-Bak