Other mistake: Indy's bridge breaks and he is hanging by it with the natives shooting arrows at him. If you look closely you can see two arrows bounce off his back. All the other clatter noisily onto the cliff-face or stick in the bridge, so it's not like they've lost much force due to the range.
Continuity mistake: During the 8 minute race on the mine carts through the mine. The group passes several bottomless cliffs, several huge holes, and even a hole of lava about 200 feet long. Yet when the water is released, it gets to them in about 30 seconds, and shows no sign of stopping when they outrun it.
Continuity mistake: Outside the club, a sailor and a girl are in a buggy, which crashes. When the buggy is on the road, the sailor is on one side - when it crashes, he is on the other side, having swapped places with the girl.
Continuity mistake: All during the fight in the sacrifice temple, the strap across Indy's chest hangs from his left shoulder to his right side. When he hugs Shorty, the strap is reversed. Also, the blood on his mouth occasionally switches sides, as does the parting of his hair. They obviously flipped the negative. Fixed in the DVD version.
Revealing mistake: When Indy and Willie jump out of the Obi Wan Nightclub, they fall through several awnings, the idea being that they will break the characters' fall. All well and good. But, if you look very carefully, you can see small taped-up cut marks which the crew made so the stunt men (and women) could effortlessly glide though the awnings.
Continuity mistake: During the escape from the mine, Indy has to slide along on a rope to catch his companion's cart. Whilst hanging from the rope the shot switches from in front to behind a number of times. Depending on the shot, Indy switches from barely hanging on to having the rope grasped tightly next to him.
Continuity mistake: The jet of water comes out through a squared hole on the rocks, and seconds later comes through many other places, making the first hole much bigger, and making pieces of rock fall off. However, when Indy cries, "Let's meet up at the bridge!" there's an aerial shot of him climbing and the mountain has the very same perfect structure as before the jet of water burst.