Revealing mistakesWhen Indy is on the tank and ends up shooting all three Nazi soldiers with one bullet, you can see the squibs/blood packets packed inside their uniforms.
Boom mic visible
Crew or equipment visible
Errors in geography
Incorrectly regarded as goofs
AnachronismsWhen Donovan drinks from the false grail (at least 800 years old if it was brought by the knight, supposedly older), a steel hexagonal nut holding the base to the stem is clearly visible as Donovan tips the goblet.
ContinuityFrom the scene onwards where Henry Jones and Indy help Marcus Brody out of the tank, the radio antenna on top of the tank turret disappears.
ContinuityWhen Indy is hanging from his father's hand trying to get the fallen grail, his hand is shown to be slipping in close shots, yet wider angle shots show that Henry is holding him by the wrist and not the hand.
ContinuityWhen Elsa walks beyond the seal, she falls into the cracks. Indiana saves her and there is a close-up of Indiana losing hold of Elsa's hand, but in a shot facing Indiana he has a grip on her wrists.
ContinuityWhen Indy helps Henry Sr. to his feet after he drinks from the grail, Henry Sr. clearly still has the grail with him. However, in the next shot the grail is on the floor, and Elsa picks it up.
ContinuityWhen Elsa is reaching for the grail while holding onto Indy, the glove on her right hand starts slipping off. At first, it is seen slipping up to her fingers, but then it is seen again, this time still mostly on her hand and only slipping to the palm. The glove then slips off completely.
ContinuityWhen Indy is fighting on the tank, his father falls onto the tracks and Indy uses his whip to stop him from going over. Then when Sallah rides up on the horse to rescue Indy's father, Indy is seen throwing the whip to Sallah on the horse. After the tank falls off the cliff Indy is seen with the whip attached to his belt before any one even notices he is alive.
ContinuityAfter the tank driver is hit by the ricocheting bullet, he falls dead on the tank's directional lever, causing the tank to make a hard turn to the right (thus saving Indy from colliding into the rocks while hanging on to the side turret). With the tank driver's dead body leaning on the lever, the tank should therefore keep turning to the right and going in circles, but for the next several shots, the tank instead continues to go in a straight line before going over the cliff's edge.
- When Indiana returns to his dying father with the Grail full of water, he empties the Grail completely on Henry's bullet wound to heal him. But a few moments later, when Henry takes the Grail from Indiana's hand, it still has water in it.