Revealing mistake: In the scene where the two gangsters take the dead Deputy Sawyer's body out to sea to dispose of it, as the actor is being pushed overboard, he tucks his arms into his chest, as if to prepare for the plunge.
Key Largo (1948)
1 revealing mistake - chronological order
Directed by: John Huston
Starring: Humphrey Bogart, Lauren Bacall, Edward G. Robinson, Lionel Barrymore
Continuity mistake: When Lauren Bacall attacks Edward G. Robinson (after he goads her wheelchair-bound father-in-law into attacking him, causing him to fall over), she clearly scratches him on his left cheek. Shortly afterwards, Claire Trevor notices the scratch marks and wonders what happened. The only trouble is, she notices them on his right cheek.
Johnny Rocco: After living in the USA for more than thirty-five years they called me an undesirable alien. Me. Johnny Rocco. Like I was a dirty Red or something.