In the fight with the guys in the yellow hummer, he is thrown in front of a Silver car, and it looks as if he narrowly makes it out of the way. But when we see what is recorded on the camera, the car comes nowhere near him and he's already running back towards the other guys while the car is veering long before it would have even reached him
When Jake goes to the gym after sticking up for Baja in the parking lot, he throws a kick to Roqua's head while he trains him, in which Roqua has to duck. Later in the movie, when he's training, it shows that he cannot kick that high.
During Charlie's tennis match we see him lose a point and the announcer calls Deuce. The next point passes and the announcer calls 40-30. You then hear deuce called again moments later. We then see Charlie win a point and the announcer once again calls deuce. It is then announced on the next point that Charlie wins the game without advantage ever being called.
Fighters where brought in from Pure Pain Thai Kickboxing in Winter Springs Florida, Gracie Bara in Orlando Florida, Kokopelli's Gym in Longwood Florida, and Shogun Fight School in Orlando Florida.
A Note Regarding Spoilers
The following FAQ entries may contain spoilers. Only the biggest ones (if any) will be covered with spoiler tags. Spoiler tags have been used sparingly in order to make the page more readable.
What are the differences between the Theatrical Version and the Extended Beatdown Edition?
In the US the movie was rated PG-13 and is available on DVD in the meantime. At the same time a so called "Extended-Beatdown-Edition" was released. It offers slightly more fight scenes and some more explicit nudity.
A detailed comparison between both versions can be found here.