Revealing mistake: Right after the nuclear explosion and Indy comes out of the refrigerator, the scene changes to an airfield with two cars driving across the screen. The cars are obviously CGI, as the first one turns despite the wheels still pointing straight.
Revealing mistake: At the end Indy picks up a heavy slab and uses it to knock the carved faces off the wall. He hands it to his friend Mac, then takes it back off him - at this point it's clearly a very light prop.
Revealing mistake: When Indy and Mutt ride on the bike in the college gardens, there's a wide aerial angle that reveals that the distance to the red banner is very short, yet in every following angle they're repeating the same route over and over again (3 times at least) to make it look way longer and increase the suspense.Sacha