Other mistake: Fred's tie gets unraveled when he and Barney are trying to escape the Green Goose's dungeon. Yet, his tie is fixed a few minutes later.
The Man Called Flintstone (1966)
1 mistake
Directed by: William Hanna, Joseph Barbera
Starring: Mel Blanc, Alan Reed, Jean Vander Pyl
Green Goose: Take It Easy Slag Its Only Me Triple X.