Continuity mistake: While Indy and the Thuggee Chief Guard are battling it out, after the shot of the Maharaja gleefully stabbing the Indy doll, in Willie's next closeup she's wearing the veil as she throws rocks at the Chief Guard, but in the next wideshot the veil is gone, but it's back on her head in following shots.
Continuity mistake: Mola Ram wears a wristband on each wrist and only one armband on his right upper arm, but when he falls off the hanging bridge into the water, in the overhead shot he's suddenly wearing armbands on both upper arms.
Continuity mistake: After Willie's rescue, when she tells Indiana they should get out of there, in the next closeup just as Indy says, "Right, all of us," this is a flipped shot, note Indy's Fedora, chin scar and red strap.
Continuity mistake: During the mine cart chase, when Indy grabs the shovel to scrape the underside of the overhead metal bin, Indy's right hand is suddenly missing the cloth which is wrapped around his knuckles in previous and following shots.
Continuity mistake: While the second mine cart with Thuggee goons is in hot pursuit of Indy, note the brake pole at the front of Indy's mine cart keeps vanishing and reappearing in following shots, before it actually breaks off.
Continuity mistake: After Indy's fight with the Chief Guard on the conveyor belt, when Indy attempts to save him from the rock crusher Indy ends up hoisting himself up in mid-air, and when he reaches the platform Indy's shoes are completely flat, unlike Indy's ankle boots which have heels.
Continuity mistake: When Lao Che's goons toss Indy onto the cart at Club Obi Wan, note the soles of Indy's shoes are entirely tan with black heels, but when the cart crashes into the bandstand we see the arches of Indy's soles are black and the heels are tan.
Continuity mistake: After Indy and Willie have jumped out the window at Club Obi Wan, when they land on the lower awnings and roll off we can see Willie's high-heels have become flats.
Continuity mistake: After Indy, Willie, and Short Round jump out of the plane with the raft, when the raft finally slows down in the water Willie falls backwards with her legs up in the air and her high-heels have become flats.
Revealing mistake: After Indy escapes from the conveyor belt, he runs on some suspended planks while being shot at. Watch the planks: There's black masking tape where the explosives are (which disappear in later shots). Furthermore, right before he takes out his whip, he grabs a railing where the bullet has just hit, and you can see that the black tape is dangling loose after the spark.
Continuity mistake: Right when Indy cuts the bridge and it dangles loose towards the rocky wall, notice that Willie is above Shorty, both in an X position (very likely replaced with dolls). In the close-up of the real actors, both are very close parallel to each other.
Continuity mistake: After Willie crosses the bridge, right when Indy threatens to drop the bag, her hair style changes completely.
Revealing mistake: During the mine chase, after Indy cries to Shorty "Let it go, our only chance!" the wig of the doll replacing Willie flies away. (01:35:59)
Continuity mistake: The side of the mountain with the bridge is irregular with rough edges when seen in the wide angles, but smooth in the close-ups.
Revealing mistake: When Indy is hanging off the bridge and is punched by Mola Ram, Indy's safety wire attached to his belt is very noticeable. (01:47:45)
Continuity mistake: During the mine race, the cart behind Indy's flips over and is launched far away from the tracks, yet a frame later it's laying down right on the track for a second cart to crash against it.
Continuity mistake: The beginning of the bridge scene is really chaotic: Short walks several meters ahead, the wide angle shows he's alone, then a frame later he's several meters back plus with Willie next to him, then it cuts to him and again he's alone.
Continuity mistake: While hanging from the bridge, when the Thuggee flies down, Indy is sometimes in a higher or lower place, depending on the shot.
Revealing mistake: When the plane lands against the snowy mountain, no parts fly all over and no snow shatters at all, revealing the composite trick.
Continuity mistake: When Indy is in agony surrounded by candles, the three next to his feet change positions between shots.
Chosen answer: His neck was snapped by the whip getting caught in the fan. There isn't always blood with a hanging. Since the fan wasn't designed to hold a man's weight, the motor in it would have stopped or given out.
Captain Defenestrator