"gun's goin off"
Although this line is discussed elsewhere, nobody has asked why Annie Proulx italicized “off”.
Is it an ironic metaphor saying, “rodeo’s on”?
Doesn’t a gun shot start the rodeo?
(Jack had no way of knowing the long, hard ride that lay ahead of him.)
A guy's penis is is "gun." When I was in the US Army, we got yelled at by the training cadre if we called a rifle a "gun."
So, there was a little ditty with hand action.
This is my rifle (put hand on weapon);
This is my gun (grab your crotch).
This one's for killing (put hand on rifle);
And, this one's for fun (grab crotch of pants and smile)!
"
off " is in italics because Jack Twist choked out the words. It ain't easy to talk when a guy is having an ejaculation during an orgasm.
Oh, in Country Music, the "Midnight Rodeo" takes place between the sheets for cowboys. And, there was a line in a C&W song, "Don't call him a cowboy until you've seen him ride." The lyrics were not about rodeos but being ridden by a cowboy in the sack.