Continuity mistake: In the fight with O'Hara, Lee sidekicks O'Hara and sends him flying over backwards into the crowd. The brown bottle is left standing upright. When they cut back to O'Hara now reaching for the bottle, suddenly it's on it's side spilling the contents. (01:20:00)
Continuity mistake: Near the end of the film, Roper knocks out Bolo, Han's right-hand man. But when we see Han sending his men after Lee and Roper in the next wide shot, Bolo's body is nowhere to be seen. (01:28:40)
Visible crew/equipment: Near the end of the movie, Bruce Lee knocks Han to the ground and then the shot changes to show a frontal view of Bruce. He then lands a kick to Han's head that sends Han flying across the room. As Bruce moves towards the camera you can see a pointy object on the left side of the screen that a crew member must be holding, because in the next shot there is no pointy black thing in Bruce Lee's path. (01:34:30)
Other mistake: In the intense outdoor battle scene at the end, when Bruce kicks a guy in the face three times in a row, one of the extras in the background cracks up laughing.
Other mistake: In the briefing scene just after the main credits, Braithwaite is showing Lee a film of Han and his allies. What we are seeing is footage spliced into the film, as the shadows of the 16 millimetre projector's reels on Bruce Lee's face and the wall shows empty reels with no film in them at all.
Continuity mistake: During the fight scene with Oharra, Bruce Lee was actually cut quite badly on the hand. In later scenes in the film he can actually be seen with a bandage round the injured hand.
Revealing mistake: When Han is killed by Bruce Lee, and the door is spinning, you can see the belt that holds Han to the door.
Revealing mistake: During the fight scene between Han and Bruce Lee toward the end of the movie, Bruce Lee knocks Han to the ground. The shot changes to show a frontal view of Bruce as he lands a crushing kick on Han. It looks like Han was replaced with a dummy for this shot, as Bruce's kick seems to just send Han across the room. As I reviewed the scene, I could see that Han was actually a dummy of some sort .
Audio problem: When Williams is checking out the tray of meat he points and says "hmm, No, I really don't think so." His words don't match up to his mouth.
Other mistake: When you watch the movie with Spanish subtitles, when Williams sees Lee on a tree or something he says, "Ah, a human fly". Yet the subtitles say, "La araña humana", which translates to "A human spider".
Continuity mistake: During the fight scene in the mirror room, Lee starts to punch and kick the mirrors. During several shots, Lee is wearing shoes that fully cover the top of his foot. In others, he is wearing a pair of shoes that have a V cut down the top of his foot which you can clearly see with his white socks.
Other mistake: When Williams is fighting Parsons, watch for a shot when Williams backs up against the camera - he actually bumps into it and it narrows the picture somewhat. This is most noticeable in the widescreen version.
Revealing mistake: In Han's first scene, when he enters the banquet hall to welcome fighters he holds both arms out and the fingers on his solid metal hand are spread. Later on after beating Williams to death he takes off his glove to reveal his metal hand. Look at the glove before he does this; he moves his fingers.
Continuity mistake: Someone got a little makeup happy. In Han's office, Williams beats up a few guards and then Han takes things into his own hands (or hand as it turns out.) As they fight, there is a shot of Williams head-on just before Han hits his birdcage. Williams has a bruise under his eye. But why? Han hasn't hit him yet and neither did any of the guards. Nor was he hit in the face during his match with Parsons earlier in the film. I suppose it could be a shadow but it doesn't look like it.
Revealing mistake: When John Saxon is shown through the dungeon by Shih Kien, a tramp looks glumly at him through the bars. This exact same shot is used later during Bruce Lee's fight with the guards.
Revealing mistake: When Bruce Lee is fighting the guards in the secret underground lair, he uses a staff to beat up the guards but there is one moment where he whacks a guard who was about 5 metres away even though the staff was only about 2 metres long.
Continuity mistake: When Bruce has the battle underground he has black socks on, but when he is captured and they show him being untied outside he has white socks on.
Continuity mistake: When they're fighting in the mirror place, Bruce gets slashed on the face. The space between the cuts is narrower than the cuts he gets from the same claw when he gets slashed on the belly.
Continuity mistake: In the banquet sequence, John Saxon is shown sitting with a glass in his hand. The level of liquid in the glass fluctuates alarmingly from shot to shot.
Continuity mistake: During the fight scene near the end of the film between Han's white clad henchmen and the black dressed good guys, there is a shot of a guy spin kicking another that is shown 3 times. Many other shots are shown more than once, from close up or a slightly different angle.
Answer: Yes, he filmed all of his scenes before he died. He died on July 20, 1973 - only six days before the film debuted in Hong Kong, and only a month before the film's US debut.
TedStixon