Continuity mistake: Indy's head position and hairstyle keeps changing in the shots after the test jet comes to a stop.
Sacha
Continuity mistake: The drawing that Ox makes in front of Indy differs between shots: Watch the shape of the sun.
Continuity mistake: Before Indy finds the crystal skull, the mummy's head has a piece of cloth on its forehead. In a wide shot immediately afterwards, this cloth disappears.