Other mistake: When the old man was resuscitating the unconscious boy he kept his arm sticking up in the air. His arm should have been besides his body, limp and unmoving.
The Treasure of the Sierra Madre (1948)
1 other mistake - chronological order
Directed by: John Huston
Starring: Humphrey Bogart, Walter Huston, Bruce Bennett, Tim Holt
Revealing mistake: When Howard and Curtin chase Dobbs, they pass a dead donkey which is obviously breathing, and the rope used to tie its legs together is visible too.
More quotes from The Treasure of the Sierra Madre
Trivia: Director John Huston has a cameo as the white-suited man who gets increasingly irritated when Humphrey Bogart repeatedly begs him for money.