To diverge a bit, and coming from a rural background - I was curious about the original use of the Threshing Circle in the shootout at the end of this movie. Then I watched Trinity is still my Name the other night which shows the monks in the monastery using hand flails to separate the grain from the straw.
It seems the Threshing Circle was common in Spain with the community sharing the Circle and the work.
Horses have also been used in the Threshing Circle to perform the same task.
Online info tells me that the Threshing Circles were called “eras” in Spain, era coming from Latin for area which means open space used for building sites, threshing floors etc. (“eras de trigo” - areas of wheat).
For a few dollars more:
Trinity is still my name:
Threshing without the Threshing Circle - Youtube video: