Other mistake: When they're roping the mustangs, the "stallion" doesn't have the genitals of a stallion.
The Misfits (1961)
1 mistake
Directed by: John Huston
Starring: Clark Gable, Marilyn Monroe, Montgomery Clift, Thelma Ritter
Gay: I hope your sober.
Perce: Man I have won buckets of money in towns I couldn't even remember the names of.