Gotta be the "high noon duel" in western movies. That didn't happen much in the real wild west.
Citizens shooting at gangs during bank robberies? Yup.
Shootout at The OK Corral? Yup.
Lynching of accused criminals before a judge could come to town? Oh hell yes.
But that trope of lawman/outlaw facing off in the middle of the street for a prearranged gun duel just didn't really happen.