Revealing mistake: When Sonny is punching Carlo under the spraying fire hydrant, he misses an audible punch by at least six inches. (01:43:30)
Revealing mistake: In a scene where the canoes are shooting the rapids through a sheer cliff you can clearly see a stuntman climbing out of the water onto the rock.
Revealing mistake: When the ship is upside-down and they're trying to get Susan down from the table, you can see that the table really isn't attached to the ceiling. You can see the center pool split into legs that are supposed to be connected to the floor, but when Susan moves around and shakes the table, the legs shake and you can see space between them and the floor. Even if the other legs outside of the shot were connected, the table would be leaning under Susan's weight.
Revealing mistake: When Weasel says, "How's your back, baby?" to Phyllis, she spits in his face, but Weasel closes his eyes before she spits.
Revealing mistake: During the iconic dojo brawl scene, Bruce Lee at one point picks up two men and whirls them around. It's obvious in the wide shot that they are just dummies.
Revealing mistake: When Shaft fights the bad guys disguised as flower delivery men, both die with their blood packs that explode triggered by visible pyrotechnics - kinda odd to shoot a guy and see literally flames burst out from his chest or back before any blood comes out. (00:48:50)
Revealing mistake: When Stewart's wrestling with the alligator look closely and you can see the black strap keeping its jaw shut.
Revealing mistake: When O-Yuki is having a flashback to the duel she had with her trainer, at one point he "magically" sets his sword on fire. However, if you watch the scene carefully you can see a cord that runs from the sword into his robes, probably some kind of fuel line. You can see it twice: once in a wide shot showing the trainer and O-Yuki when he laughs and slowly raises the sword and a second time when he blocks O-Yuki's attack and punches her in the stomach. (00:45:58)