Factual error: The Major that salutes Colonel Weber next to the train, credited as Gestapo Officer, has the SS runes on his neck instead of a black square. (00:05:25)
Revealing mistake: When young Indy jumps from his car to the motorbike and fights against a German - and the following scene where he rides on the bike towards the train - his body and especially his face are a blatant CGI creation with unnatural movements, dead eyes, and waxy, lifeless expressions (most noticeable in theater screenings). (00:05:53)
Continuity mistake: When Indy drives the Nazi car, he turns the steering wheel to our right, but the car skids to the left. (00:07:10)
Continuity mistake: As the Nazi captain gives orders to the soldiers to grab the sides of the train, the roof of the train is empty. When the captain himself grabs the side of the train, four soldiers appear on the roof. (00:15:40)
Factual error: The four-barrelled Flak gun is shown running out of ammunition, namely a belt of rounds. This is most likely intended to be a Flak 38, which used twenty-round magazines, not belts. It had a relatively low rate of fire as the magazines had to be constantly swapped out, and two barrels were usually fired at a time. (00:16:58)
Continuity mistake: After Baxter says "It's for you, Doctor", in the next shot, the phone on his left hand disappears. Also, the illumination of the room where Voller goes in changes between shots. (00:47:12)
Revealing mistake: During the tuk tuk chase, skid marks from previous takes are visible on the road. (01:03:13)
Other mistake: Dive boat interior, as the tablet is unboxed, there is a clear lens distortion as Indi looks round to his diver friend and the focus follows - giving a disturbing jolt to the image. (01:08:27)
Factual error: Whilst Indy and friends dive the Roman shipwreck, they descend and ascend rapidly to and from the sea floor. The conventional method to dive at depth is to descend slowly - to equalise your pressure, as well as to ascend slowly - once more to equalise for the pressure differences. The 3-minute dive duration, with rapid descents and ascent, simply is not possible without the effect of causing serious trauma to the body. (01:09:30 - 01:14:50)
Continuity mistake: After the Roman shipwreck, the Spanish flag on the dive boat goes from flapping vividly in the wind in one shot to then hanging limp in the next. This discrepancy is throughout all of the exterior dive boat scenes. This likely shows which clips were filmed on location and which were filmed in a studio. (01:09:40)
Revealing mistake: When Hauke breaks the neck of one of the American soldiers in the plane, it is very obvious that he only rests his hands on the soldier's head without twisting his neck. (01:10:14)
Other mistake: When the divers ascend from the Roman shipwreck, an odd sort of heat-seeking mini-torpedo or poison homing dart projectile is fired down from the surface. Any idea what this is supposed to be? The henchmen on the boat appear to be wielding a knife, a Luger, and a (wrong for the period) 1986 micro Uzi. (01:10:20)
Continuity mistake: Within the Roman shipwreck, Indy is grappling with his fear of snakes (eels) with his red flare; a torch light is briefly shone on his head from above. When the shot reverses to the diver at his rescue, she has no torch at all in sight. (01:11:12)
Other mistake: Whilst swimming towards the Roman shipwreck, the divers appear to be moving at a speed similar to an unrestricted diver wearing flippers. The drag resistance from the air pipe umbilical, together with the divers' lead boots, would make this an unfeasible maneuver in real life. Equally, the divers have no BCD or method of maintaining equal buoyancy and would sink to the seafloor - not swim like a fish. (01:13:14)
Other mistake: As the divers prepare to descend to the Roman shipwreck, none of their buoyancy aid inflation valves are connected to an air intake. This makes the rapid inflation, which happens on their ascent back to the surface, impossible. (01:15:15 - 01:15:50)
Continuity mistake: While on the boat, Helena does her 7 spades card trick. When she gives Indy a turn, you can see the bottom card is a black 2. When she fans them out, it changes to black king of clubs. Then, in the next shot, it changes to 8 of clubs. (01:16:00 - 01:17:00)
Suggested correction: Not necessarily a mistake. She could be changing those cards by sleight of hand, while moving the 7 of spades into position for the final force. The mistake was not using the 3 of clubs for it.
Factual error: The night before Indy dives on the Roman wreck, his co-star describes the plan. An initial 70ft drop, followed by a further 300ft descent to the sea floor. Essentially, if you breathe compressed air to equalise your lungs to the surrounding pressure, then you cannot ascend to the surface rapidly from that depth. Breathing normal air, you can suffer from oxygen toxicity at around 56m. Due to the partial pressure law, at 370ft/112m, you would need a heliox mix (10% oxygen) from a second tank to survive. (01:21:00 - 01:22:08)
Continuity mistake: Klaber handcuffs Teddy and Hauke, then moves on. He is followed by Hauke, Teddy, and Gunther. In the next shot, Voller and the two unnamed Nazis have suddenly appeared behind Klaber, and Hauke (with Teddy) and Gunther have switched places. (01:48:44)
Continuity mistake: Voller and his goons are walking through the bridge. Just after Teddy and Hauke fall off, Voller says, "Leave them." Gunther has disappeared. (01:49:22)
Suggested correction: It's not a distortion. It's a visual effect produced when the camera swaps from having a blurry background to a focused one. It happens again when Indy and Helena are about to steal the car (1:40:10).
Sacha ★
Suggested correction: It just appears to be the result of the movie doing a slightly unconventional rack focus. I don't think that really qualifies as a mistake. If it does count, it opens far too big a can of worms in terms of various camera techniques being considered "mistakes."
TedStixon