Sacha

Revealing mistake: When the car is chased by a plane and enters a cave, check the rocks above the entrance and you'll notice that both the entrance and exit are the same location and the final shot has been flipped.

Sacha ★

Revealing mistake: The seagulls on the beach (when Dr. Jones scares them with his umbrella) are blatantly fake. They don't move an inch. This was also confirmed by producer Robert Watts in this making-of video https://www.youtube.com/watch?v=BMFMKsrXuGY (minute 2'30").

Sacha ★

Revealing mistake: When the tank shoots-up the jeep the interior is revealed to be empty and such a prop.

Sacha ★

Revealing mistake: When Elsa falls through the crack in the hole, she is swallowed by a big cloud of smoke in the void. However, her silhouette is visible underneath the smoke, revealing she never falls any deeper, and thus giving away how shallow the hole was.

Sacha ★

Revealing mistake: Dr. Jones fires at the jeep from the tank, but the explosion doesn't come out the cannon, nor by the jeep's window next to it; instead the back of the jeep explodes.

Sacha ★

Revealing mistake: In the temple, when Indy walks on air, he briefly becomes semi-invisible due to the matte effect.

Sacha ★

Revealing mistake: A bomb falls in front of Indy's car, creating a crater where the car falls into. Dr. Jones Sr. doesn't move forward due to the momentum of the crash, revealing he's been replaced by a dummy.

Sacha ★

Revealing mistake: The stuntman who saves Indy's dad from the tank has a perfectly trimmed beard and a thinner face than Sallah's.

Sacha ★