After Kurt has knocked Tong Po out of the ring and he is supposed to be unconscious, as soon as the music starts to signify the start of the credits you can see Tong Po lift up is head very quickly in the background.
Towards the end of the second round, there is one sequence where Tong Po punches Kurt in the stomach 4 times, punches him in the face 3 times, punches him in the face 13 times rapidly, punches him in the stomach 9 times rapidly, and then does this double-fist type of move on his face. Tong Po's hands are covered in broken glass. In all probability, Kurt's face and stomach would resemble raw hamburger meat at this point, but he only has one major cut on his face and one on his stomach, both of which occurred earlier in the fight.
In Kurt's training scene with Xian where he continually kicks the tree, his shin is a bloody mess and he can't walk afterwards. In subsequent training scenes, including the very next scene in the pool, there is not even a scratch on his shin.
When Kurt gets drunk at the bar with Xien and starts fighting, one of the men breaks a drinking glass in half over the counter and is holding a part of the now broken glass. The camera shows Kurt, then goes back to the man and he doesn't have the glass in his hand. Then he gets a roundhouse kick to the face.
During the final fight, Kurt has his wrappings cut from hands. Almost immediately, there's a shot of Tong Po, with Kurt's hand in the foreground. The just-removed wrappings can just be seen at the bottom edge of the screen.
When Tong Po delivers the devastating elbow to Eric, if you look carefully at the bottom of the
screen as Eric falls to the canvas, you can see The Director, David Worth's arm and the camera filming the previous action of Tong Po delivering the elbow from above Eric when he's on the floor.
When Kurt's brother is being rescued, his hands are tied behind his back and tries to fight off the attackers. Again, although being paralyzed, he manages to step with his left leg twice while sitting in the chair before the scene is over.