Revealing mistake: When they are feeding Annie the Elephant medicine with a wooden spoon, there is obviously no fluid in the spoon.
Revealing mistake: When the snakes in the pit are shown, all their heads are held up by black strings. (01:17:00)
Gunga Din (1939)
2 revealing mistakes
Directed by: George Stevens
Starring: Cary Grant, Joan Fontaine, Sam Jaffe, Victor McLaglen, Douglas Fairbanks Jr.
Continuity mistake: When the curtain gets stuck to Ballantine's pants, at first it's stuck on his side, then in the next shot it's stuck in the middle of his back.