Continuity mistake: Gene Hackman and John Shea are both doused with water when they come out of the restroom. In the next shot, their hair is completely dry.
Revealing mistake: When McDonald is in the tunnels and is called to pick up the phone, he picks up a red phone. It is a standard Bell TouchTone desk phone. To make the phone look more futuristic, there was no cord and it was disguised as a cordless phone. The port that the cord would plug into is covered by a piece of colored tape. This also can be seen in the operations center of Ape Control when the worker picks up the phone.
Continuity mistake: The protagonist is weilding his karate skills against the crooked cops in the final fight scene. One of his foes is wearing a white fishing cap. Superfly belts him and knocks of the cap, there is a cut and then the cap is on again. The cap is on and then off again twice more in the same fight scene.
Continuity mistake: After Bruce Lee kills Chuck Norris, he walks back and picks up Chucks Gi and Obi (karate shirt and karate belt). The belt is hanging and dragging on the floor but as Bruce walks from behind a column, the Obi appears to be folded properly.
Continuity mistake: At the end of the film when Oliver Reed is in the Range Rover and ramming the Hillman Avenger, watch the number plate of the Avenger. It switches repeatedly between a 'K' suffix and a 'J'.
Audio problem: When Bruce Lee finishes fighting with the Japanese school using a nunchaku and is going to fight with the fat man, he folds the weapon and tosses it to the floor on his left. It lands without making a sound.
Visible crew/equipment: When Spencer and Hill fly the second air plane, the studio headlights are mirrored in Hill's sunglasses. (00:20:35)
Factual error: When Craig is being tortured in "New York," a spy operative threatens to plug in the electric shock machine in a European socket/outlet, rather than an American-type socket.
Revealing mistake: When Itto puts the cover on the baby carriage it's obvious that the sudden downpour of rain is just a sprinkler placed in front of the camera. Pay attention to the cover, Itto's clothing and the puddle behind the carriage, they remain completely dry/untouched. (00:11:00)
Revealing mistake: When Anguirus makes his sacrificial charge against Gigan, the hand that is moving the Anguirus costume can be seen holding it.
Continuity mistake: At the beginning of the movie, Bruce Lee enters a restaurant in the Rome airport and, because he can't read the menu nor speak the language, he accidentally orders five bowls of Campbell's Soup. When the waitress first delivers the five bowls, the soups are very different colors than they are in subsequent close-ups. Disappointed but hungry, Bruce plows into the soup. Ten sequential close-up shots show him dipping his spoon into bright red, tomato-based soups; but, by the time the spoon reaches his mouth, the spoon is dripping creamy white soup, every time.
Revealing mistake: When Itto is battling the group of male ninja in the forest there is a moment when two ninjas throw chains towards Itto and in the close-up shot of the two chains flying at Itto the wires attached to the ends, guiding them, are visible. (00:33:55)
Continuity mistake: After the scene when Aguirre and his men raid the cannibal village they get back on the raft. Aguirre approaches Ursua, lying injured next to his wife, and stares him down. Ursua's wife then stands up to Aguirre and grabs his arm. The shot then changes to a different angle and suddenly the horse appears behind Aguirre so that he can walk into it unexpectedly as he turns around. (00:53:30)
Other mistake: It makes no sense that the pimp would die from having the tip of his tongue bitten off. (00:23:35)
Continuity mistake: The mafioso with the rainbow scarf hands his boss a drink, extending his arm. The next shot begins with his arm bent, and the third mafioso acting as barista is also in a position inconsistent with the previous shot. (00:15:00)
Revealing mistake: At the beginning of the film O-Yuki is fighting the men in the forest and kills them one by one. When she kills the last one there is a close-up shot of her dagger entering his rib area and blood sprays out. However, if you pay close attention you can see the blood sprays out of his sleeve (presumably there is a device in there), not his torso. (00:01:18)
Revealing mistake: The protagonist jumps from a bridge and boards the train to try to save the Professor. When he is walking on the top of the carriages, look at the treetops in the background; the train is stationary. (00:12:00)
Continuity mistake: When Mr. Kumagoro visits the Uncle at the hospital, he drops a package on him; the niece looks at him startled, her arms crossed in a different position between shots.
Revealing mistake: At the beginning, when the woman in the flotation seat is paddling backwards, you can see a fishing line attached to the back of seat that is being pulled to help her move backwards.