I've been hanging out at a Facebook Group called Outlaw Legacy, and they link to a lot of westerns that have become iconic over the past decade. One of the posters put up recently is a quote from Lonesome Dove. In that clip, Woodrow Call beats an Army scout to within an inch of his life. In doing so, he scared the living hell out of the townspeople, so he explains his behavior.
I'll have to dig this one out to watch again this winter. It's a favorite.