When Bruce's character kills his Russian opponent near the end of the movie he grabs Petrov's hair by the top of his head. When he chops Petrov in the throat he suddenly has his hair from the back.
As Chen makes his way through the Japanese school at the end of the movie he cautiously goes to open the sliding doors by using one hand and standing to the side. Upon opening the door the scene cuts to the other side and he is suddenly standing centrally and opens both doors together. This happens more than once.
To impress the students of the Japanese school, Petrov drives 7 long nails clear through a thick wooden plank with his bare hands. But when he raises the plank to display his handy work, only 4 nails are protruding from the bottom.
During the scene with the rickshaw there is a bar going from one side to the other where Chen is holding. When he throws the rickshaw the bar has disappeared.
When Chen is wheeling his enemy's drunk servant in a rickshaw, he moves through multiple shots starting at night time. One of the shots is complete daylight. Eventually in the final shot it is night time again, making it seem like Chen had been wheeling for 24 hours to wheel this man home.
Yoshida's hakama is worn backwards.
The nihonto (sword) in the Japanese dojo is mounted upside down and back to front.
Furthermore it is not placed in front of the kamidana, which incidentally is at the back of the mat area, not in the kamiza or "head" of the mat.
Both are placed in an incredibly disrespectful manner.
Furthermore it is not placed in front of the kamidana, which incidentally is at the back of the mat area, not in the kamiza or "head" of the mat.
Both are placed in an incredibly disrespectful manner.
When Bruce is spinning the two Bushido students in the Bushido school, they are clearly two lightweight dummies.
In the opening, at the funeral of the master, there is a rain storm but the dirt they are shoveling into the grave is dry.
At the beginning of the movie when Chen is sent to see his uncle's burial he's given a green umbrella for the rain. When outside he is using an orange umbrella.
At the beginning of the second nunchaku fight, the nunchaku bend, revealing that it is soft rubber and not wood or metal.
During the final fight between Chen and Yoshida, Chen manages to kick the katana out of Yoshida's hands. While the katana is falling, the blade end is pointing away from Chen. But in the next shot where Yoshida is stabbed, the blade end is facing the opposite direction, towards Chen.
Outside the park that only grants admission to non-Chinese, a couple in 1970s clothing and haircuts walk by. Also, deep in the background 1960s cars are parked.
Approx. one hour into the film, there is a scene where a phonograph player is playing. Record players of that type were not invented until near the end of the 19th Century.
In the final battle as Suzuki is kicked through the shoji screen, you can see his white belt wrapping itself around the stunt wire used to lower him down to the ground below.